gcc/configure.ac

   1 # configure.ac for GCC
   2 # Process this file with autoconf to generate a configuration script.
   3
   4 # Copyright 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
   5 # Free Software Foundation, Inc.
   6
   7 #This file is part of GCC.
   8
   9 #GCC is free software; you can redistribute it and/or modify it under
  10 #the terms of the GNU General Public License as published by the Free
  11 #Software Foundation; either version 2, or (at your option) any later
  12 #version.
  13
  14 #GCC is distributed in the hope that it will be useful, but WITHOUT
  15 #ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  16 #FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  17 #for more details.
  18
  19 #You should have received a copy of the GNU General Public License
  20 #along with GCC; see the file COPYING.  If not, write to the Free
  21 #Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
  22 #02110-1301, USA.
  23
  24 # --------------------------------
  25 # Initialization and sanity checks
  26 # --------------------------------
  27
  28 AC_PREREQ(2.59)
  29 AC_INIT
  30 AC_CONFIG_SRCDIR(tree.c)
  31 AC_CONFIG_HEADER(auto-host.h:config.in)
  32
  33 gcc_version=`cat $srcdir/BASE-VER`
  34
  35 # Determine the host, build, and target systems
  36 AC_CANONICAL_BUILD
  37 AC_CANONICAL_HOST
  38 AC_CANONICAL_TARGET
  39
  40 # Determine the noncanonical target name, for directory use.
  41 ACX_NONCANONICAL_TARGET
  42
  43 # Determine the target- and build-specific subdirectories
  44 GCC_TOPLEV_SUBDIRS
  45
  46 # Set program_transform_name
  47 AC_ARG_PROGRAM
  48
  49 # Check for bogus environment variables.
  50 # Test if LIBRARY_PATH contains the notation for the current directory
  51 # since this would lead to problems installing/building glibc.
  52 # LIBRARY_PATH contains the current directory if one of the following
  53 # is true:
  54 # - one of the terminals (":" and ";") is the first or last sign
  55 # - two terminals occur directly after each other
  56 # - the path contains an element with a dot in it
  57 AC_MSG_CHECKING(LIBRARY_PATH variable)
  58 changequote(,)dnl
  59 case ${LIBRARY_PATH} in
  60   [:\;]* | *[:\;] | *[:\;][:\;]* |  *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
  61     library_path_setting="contains current directory"
  62     ;;
  63   *)
  64     library_path_setting="ok"
  65     ;;
  66 esac
  67 changequote([,])dnl
  68 AC_MSG_RESULT($library_path_setting)
  69 if test "$library_path_setting" != "ok"; then
  70 AC_MSG_ERROR([
  71 *** LIBRARY_PATH shouldn't contain the current directory when
  72 *** building gcc. Please change the environment variable
  73 *** and run configure again.])
  74 fi
  75
  76 # Test if GCC_EXEC_PREFIX contains the notation for the current directory
  77 # since this would lead to problems installing/building glibc.
  78 # GCC_EXEC_PREFIX contains the current directory if one of the following
  79 # is true:
  80 # - one of the terminals (":" and ";") is the first or last sign
  81 # - two terminals occur directly after each other
  82 # - the path contains an element with a dot in it
  83 AC_MSG_CHECKING(GCC_EXEC_PREFIX variable)
  84 changequote(,)dnl
  85 case ${GCC_EXEC_PREFIX} in
  86   [:\;]* | *[:\;] | *[:\;][:\;]* |  *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
  87     gcc_exec_prefix_setting="contains current directory"
  88     ;;
  89   *)
  90     gcc_exec_prefix_setting="ok"
  91     ;;
  92 esac
  93 changequote([,])dnl
  94 AC_MSG_RESULT($gcc_exec_prefix_setting)
  95 if test "$gcc_exec_prefix_setting" != "ok"; then
  96 AC_MSG_ERROR([
  97 *** GCC_EXEC_PREFIX shouldn't contain the current directory when
  98 *** building gcc. Please change the environment variable
  99 *** and run configure again.])
 100 fi
 101
 102 # -----------
 103 # Directories
 104 # -----------
 105
 106 # Specify the local prefix
 107 local_prefix=
 108 AC_ARG_WITH(local-prefix,
 109 [  --with-local-prefix=DIR specifies directory to put local include],
 110 [case "${withval}" in
 111 yes)    AC_MSG_ERROR(bad value ${withval} given for local include directory prefix) ;;
 112 no)     ;;
 113 *)      local_prefix=$with_local_prefix ;;
 114 esac])
 115
 116 # Default local prefix if it is empty
 117 if test x$local_prefix = x; then
 118         local_prefix=/usr/local
 119 fi
 120
 121 # Don't set gcc_gxx_include_dir to gxx_include_dir since that's only
 122 # passed in by the toplevel make and thus we'd get different behavior
 123 # depending on where we built the sources.
 124 gcc_gxx_include_dir=
 125 # Specify the g++ header file directory
 126 AC_ARG_WITH(gxx-include-dir,
 127 [  --with-gxx-include-dir=DIR
 128                           specifies directory to put g++ header files],
 129 [case "${withval}" in
 130 yes)    AC_MSG_ERROR(bad value ${withval} given for g++ include directory) ;;
 131 no)     ;;
 132 *)      gcc_gxx_include_dir=$with_gxx_include_dir ;;
 133 esac])
 134
 135 # This logic must match libstdc++-v3/acinclude.m4:GLIBCXX_EXPORT_INSTALL_INFO.
 136 if test x${gcc_gxx_include_dir} = x; then
 137   if test x${enable_version_specific_runtime_libs} = xyes; then
 138     gcc_gxx_include_dir='${libsubdir}/include/c++'
 139   else
 140     libstdcxx_incdir='include/c++/$(version)'
 141     if test x$host != x$target; then
 142        libstdcxx_incdir="$target_alias/$libstdcxx_incdir"
 143     fi
 144 changequote(<<, >>)dnl
 145     gcc_gxx_include_dir="\$(libsubdir)/\$(unlibsubdir)/..\`echo \$(exec_prefix) | sed -e 's|^\$(prefix)||' -e 's|/[^/]*|/..|g'\`/$libstdcxx_incdir"
 146 changequote([, ])dnl
 147   fi
 148 fi
 149
 150 AC_ARG_WITH(cpp_install_dir,
 151 [  --with-cpp-install-dir=DIR
 152                           install the user visible C preprocessor in DIR
 153                           (relative to PREFIX) as well as PREFIX/bin],
 154 [if test x$withval = xyes; then
 155   AC_MSG_ERROR([option --with-cpp-install-dir requires an argument])
 156 elif test x$withval != xno; then
 157   cpp_install_dir=$withval
 158 fi])
 159
 160 # We would like to our source tree to be readonly.  However when releases or
 161 # pre-releases are generated, the flex/bison generated files as well as the
 162 # various formats of manuals need to be included along with the rest of the
 163 # sources.  Therefore we have --enable-generated-files-in-srcdir to do
 164 # just that.
 165
 166 AC_MSG_CHECKING([whether to place generated files in the source directory])
 167   dnl generated-files-in-srcdir is disabled by default
 168   AC_ARG_ENABLE(generated-files-in-srcdir,
 169 [  --enable-generated-files-in-srcdir
 170                           put copies of generated files in source dir
 171                           intended for creating source tarballs for users
 172                           without texinfo bison or flex.],
 173       generated_files_in_srcdir=$enableval,
 174       generated_files_in_srcdir=no)
 175
 176 AC_MSG_RESULT($generated_files_in_srcdir)
 177
 178 if test "$generated_files_in_srcdir" = "yes"; then
 179   GENINSRC=''
 180 else
 181   GENINSRC='#'
 182 fi
 183 AC_SUBST(GENINSRC)
 184
 185 # -------------------
 186 # Find default linker
 187 # -------------------
 188
 189 # With GNU ld
 190 AC_ARG_WITH(gnu-ld,
 191 [  --with-gnu-ld           arrange to work with GNU ld.],
 192 gnu_ld_flag="$with_gnu_ld",
 193 gnu_ld_flag=no)
 194
 195 # With pre-defined ld
 196 AC_ARG_WITH(ld,
 197 [  --with-ld               arrange to use the specified ld (full pathname)],
 198 DEFAULT_LINKER="$with_ld")
 199 if test x"${DEFAULT_LINKER+set}" = x"set"; then
 200   if test ! -x "$DEFAULT_LINKER"; then
 201     AC_MSG_ERROR([cannot execute: $DEFAULT_LINKER: check --with-ld or env. var. DEFAULT_LINKER])
 202   elif $DEFAULT_LINKER -v < /dev/null 2>&1 | grep GNU > /dev/null; then
 203     gnu_ld_flag=yes
 204   fi
 205   AC_DEFINE_UNQUOTED(DEFAULT_LINKER,"$DEFAULT_LINKER",
 206         [Define to enable the use of a default linker.])
 207 fi
 208
 209 AC_MSG_CHECKING([whether a default linker was specified])
 210 if test x"${DEFAULT_LINKER+set}" = x"set"; then
 211   if test x"$gnu_ld_flag" = x"no"; then
 212     AC_MSG_RESULT([yes ($DEFAULT_LINKER)])
 213   else
 214     AC_MSG_RESULT([yes ($DEFAULT_LINKER - GNU ld)])
 215   fi
 216 else
 217   AC_MSG_RESULT(no)
 218 fi
 219
 220 # With demangler in GNU ld
 221 AC_ARG_WITH(demangler-in-ld,
 222 [  --with-demangler-in-ld  try to use demangler in GNU ld.],
 223 demangler_in_ld="$with_demangler_in_ld",
 224 demangler_in_ld=no)
 225
 226 # ----------------------
 227 # Find default assembler
 228 # ----------------------
 229
 230 # With GNU as
 231 AC_ARG_WITH(gnu-as,
 232 [  --with-gnu-as           arrange to work with GNU as],
 233 gas_flag="$with_gnu_as",
 234 gas_flag=no)
 235
 236 AC_ARG_WITH(as,
 237 [  --with-as               arrange to use the specified as (full pathname)],
 238 DEFAULT_ASSEMBLER="$with_as")
 239 if test x"${DEFAULT_ASSEMBLER+set}" = x"set"; then
 240   if test ! -x "$DEFAULT_ASSEMBLER"; then
 241     AC_MSG_ERROR([cannot execute: $DEFAULT_ASSEMBLER: check --with-as or env. var. DEFAULT_ASSEMBLER])
 242   elif $DEFAULT_ASSEMBLER -v < /dev/null 2>&1 | grep GNU > /dev/null; then
 243     gas_flag=yes
 244   fi
 245   AC_DEFINE_UNQUOTED(DEFAULT_ASSEMBLER,"$DEFAULT_ASSEMBLER",
 246         [Define to enable the use of a default assembler.])
 247 fi
 248
 249 AC_MSG_CHECKING([whether a default assembler was specified])
 250 if test x"${DEFAULT_ASSEMBLER+set}" = x"set"; then
 251   if test x"$gas_flag" = x"no"; then
 252     AC_MSG_RESULT([yes ($DEFAULT_ASSEMBLER)])
 253   else
 254     AC_MSG_RESULT([yes ($DEFAULT_ASSEMBLER - GNU as)])
 255   fi
 256 else
 257   AC_MSG_RESULT(no)
 258 fi
 259
 260 # ---------------
 261 # Find C compiler
 262 # ---------------
 263
 264 # If a non-executable a.out is present (e.g. created by GNU as above even if
 265 # invoked with -v only), the IRIX 6 native ld just overwrites the existing
 266 # file, even when creating an executable, so an execution test fails.
 267 # Remove possible default executable files to avoid this.
 268 #
 269 # FIXME: This really belongs into AC_PROG_CC and can be removed once
 270 # Autoconf includes it.
 271 rm -f a.out a.exe b.out
 272
 273 # Find the native compiler
 274 AC_PROG_CC
 275 AM_PROG_CC_C_O
 276 # autoconf is lame and doesn't give us any substitution variable for this.
 277 if eval "test \"`echo '$ac_cv_prog_cc_'${ac_cc}_c_o`\" = no"; then
 278   NO_MINUS_C_MINUS_O=yes
 279 else
 280   OUTPUT_OPTION='-o $@'
 281 fi
 282 AC_SUBST(NO_MINUS_C_MINUS_O)
 283 AC_SUBST(OUTPUT_OPTION)
 284
 285 # Remove the -O2: for historical reasons, unless bootstrapping we prefer
 286 # optimizations to be activated explicitly by the toplevel.
 287 case "$CC" in
 288   */prev-gcc/xgcc*) ;;
 289   *) CFLAGS=`echo $CFLAGS | sed "s/-O[[s0-9]]* *//" ` ;;
 290 esac
 291 AC_SUBST(CFLAGS)
 292
 293 # -------------------------
 294 # Check C compiler features
 295 # -------------------------
 296
 297 AC_PROG_CPP
 298 AC_C_INLINE
 299
 300 # sizeof(char) is 1 by definition.
 301 AC_CHECK_SIZEOF(void *)
 302 AC_CHECK_SIZEOF(short)
 303 AC_CHECK_SIZEOF(int)
 304 AC_CHECK_SIZEOF(long)
 305 AC_CHECK_TYPES([long long], [AC_CHECK_SIZEOF(long long)])
 306 AC_CHECK_TYPES([__int64], [AC_CHECK_SIZEOF(__int64)])
 307
 308 # ---------------------
 309 # Warnings and checking
 310 # ---------------------
 311
 312 # Check $CC warning features (if it's GCC).
 313 # We want to use -pedantic, but we don't want warnings about
 314 # * 'long long'
 315 # * variadic macros
 316 # * overlong strings
 317 # So, we only use -pedantic if we can disable those warnings.
 318
 319 AC_CACHE_CHECK(
 320   [whether ${CC} accepts -Wno-long-long],
 321   [ac_cv_prog_cc_w_no_long_long],
 322   [save_CFLAGS="$CFLAGS"
 323   CFLAGS="-Wno-long-long"
 324   AC_COMPILE_IFELSE([AC_LANG_SOURCE([[]])],
 325                     [ac_cv_prog_cc_w_no_long_long=yes],
 326                     [ac_cv_prog_cc_w_no_long_long=no])
 327   CFLAGS="$save_CFLAGS"
 328   ])
 329
 330 AC_CACHE_CHECK(
 331   [whether ${CC} accepts -Wno-variadic-macros],
 332   [ac_cv_prog_cc_w_no_variadic_macros],
 333   [save_CFLAGS="$CFLAGS"
 334   CFLAGS="-Wno-variadic-macros"
 335   AC_COMPILE_IFELSE([AC_LANG_SOURCE([[]])],
 336                     [ac_cv_prog_cc_w_no_variadic_macros=yes],
 337                     [ac_cv_prog_cc_w_no_variadic_macros=no])
 338   CFLAGS="$save_CFLAGS"
 339   ])
 340
 341 AC_CACHE_CHECK(
 342   [whether ${CC} accepts -Wno-overlength-strings],
 343   [ac_cv_prog_cc_w_no_overlength_strings],
 344   [save_CFLAGS="$CFLAGS"
 345   CFLAGS="-Wno-overlength-strings"
 346   AC_COMPILE_IFELSE([AC_LANG_SOURCE([[]])],
 347                     [ac_cv_prog_cc_w_no_overlength_strings=yes],
 348                     [ac_cv_prog_cc_w_no_overlength_strings=no])
 349   CFLAGS="$save_CFLAGS"
 350   ])
 351
 352 strict_warn=
 353 if test $ac_cv_prog_cc_w_no_long_long = yes \
 354    && test $ac_cv_prog_cc_w_no_variadic_macros = yes \
 355    && test $ac_cv_prog_cc_w_no_overlength_strings = yes ; then
 356   strict_warn="-pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings"
 357 fi
 358
 359 # Add -Wold-style-definition if it's accepted
 360 AC_CACHE_CHECK(
 361   [whether ${CC} accepts -Wold-style-definition],
 362   [ac_cv_prog_cc_w_old_style_definition],
 363   [save_CFLAGS="$CFLAGS"
 364   CFLAGS="-Wold-style-definition"
 365   AC_COMPILE_IFELSE([AC_LANG_SOURCE([[]])],
 366                     [ac_cv_prog_cc_w_old_style_definition=yes],
 367                     [ac_cv_prog_cc_w_old_style_definition=no])
 368   CFLAGS="$save_CFLAGS"
 369   ])
 370 if test $ac_cv_prog_cc_w_old_style_definition = yes ; then
 371   strict_warn="${strict_warn} -Wold-style-definition"
 372 fi
 373
 374 # Add -Wmissing-format-attribute if it's accepted
 375 AC_CACHE_CHECK(
 376   [whether ${CC} accepts -Wmissing-format-attribute],
 377   [ac_cv_prog_cc_w_missing_format_attribute],
 378   [save_CFLAGS="$CFLAGS"
 379   CFLAGS="-Wmissing-format-attribute"
 380   AC_COMPILE_IFELSE([AC_LANG_SOURCE([[]])],
 381                     [ac_cv_prog_cc_w_missing_format_attribute=yes],
 382                     [ac_cv_prog_cc_w_missing_format_attribute=no])
 383   CFLAGS="$save_CFLAGS"
 384   ])
 385 if test $ac_cv_prog_cc_w_missing_format_attribute = yes ; then
 386   strict_warn="${strict_warn} -Wmissing-format-attribute"
 387 fi
 388
 389 # Enable -Werror, period.
 390 AC_ARG_ENABLE(werror_always,
 391 [  --enable-werror-always         enable -Werror always], [],
 392 [enable_werror_always=no])
 393 if test x${enable_werror_always} = xyes ; then
 394   strict_warn="${strict_warn} -Werror"
 395 fi
 396 AC_SUBST(strict_warn)
 397
 398 # Get C++ compatibility warning flag, if supported.
 399 AC_CACHE_CHECK(
 400   [whether ${CC} accepts -Wc++-compat],
 401   [ac_cv_prog_cc_w_cxx_compat],
 402   [save_CFLAGS="$CFLAGS"
 403   CFLAGS="-Wc++-compat"
 404   AC_COMPILE_IFELSE([AC_LANG_SOURCE([[]])],
 405                     [ac_cv_prog_cc_w_cxx_compat=yes],
 406                     [ac_cv_prog_cc_w_cxx_compat=no])
 407   CFLAGS="$save_CFLAGS"
 408   ])
 409 if test x${ac_cv_prog_cc_w_cxx_compat} = xyes; then
 410   cxx_compat_warn="-Wc++-compat"
 411 fi
 412 AC_SUBST(cxx_compat_warn)
 413
 414
 415 # If the native compiler is GCC, we can enable warnings even in stage1.
 416 # That's useful for people building cross-compilers, or just running a
 417 # quick `make'.
 418 warn_cflags=
 419 if test "x$GCC" = "xyes"; then
 420   warn_cflags='$(GCC_WARN_CFLAGS)'
 421 fi
 422 AC_SUBST(warn_cflags)
 423
 424 # Enable expensive internal checks
 425 is_release=
 426 if test x"`cat $srcdir/DEV-PHASE`" != xexperimental; then
 427   is_release=yes
 428 fi
 429
 430 AC_ARG_ENABLE(checking,
 431 [  --enable-checking[=LIST]
 432                           enable expensive run-time checks.  With LIST,
 433                           enable only specific categories of checks.
 434                           Categories are: yes,no,all,none,release.
 435                           Flags are: assert,fold,gc,gcac,misc,
 436                           rtlflag,rtl,runtime,tree,valgrind.],
 437 [ac_checking_flags="${enableval}"],[
 438 # Determine the default checks.
 439 if test x$is_release = x ; then
 440   ac_checking_flags=yes
 441 else
 442   ac_checking_flags=release
 443 fi])
 444 ac_assert_checking=1
 445 ac_checking=
 446 ac_fold_checking=
 447 ac_gc_checking=
 448 ac_gc_always_collect=
 449 ac_rtl_checking=
 450 ac_rtlflag_checking=
 451 ac_runtime_checking=1
 452 ac_tree_checking=
 453 ac_valgrind_checking=
 454 IFS="${IFS=     }"; ac_save_IFS="$IFS"; IFS="$IFS,"
 455 for check in $ac_checking_flags
 456 do
 457         case $check in
 458         # these set all the flags to specific states
 459         yes)            ac_assert_checking=1 ; ac_checking=1 ;
 460                         ac_fold_checking= ; ac_gc_checking=1 ;
 461                         ac_gc_always_collect= ; ac_rtl_checking= ;
 462                         ac_rtlflag_checking=1 ; ac_runtime_checking=1 ;
 463                         ac_tree_checking=1 ; ac_valgrind_checking= ;;
 464         no|none)        ac_assert_checking= ; ac_checking= ;
 465                         ac_fold_checking= ; ac_gc_checking= ;
 466                         ac_gc_always_collect= ; ac_rtl_checking= ;
 467                         ac_rtlflag_checking= ; ac_runtime_checking= ;
 468                         ac_tree_checking= ; ac_valgrind_checking= ;;
 469         all)            ac_assert_checking=1 ; ac_checking=1 ;
 470                         ac_fold_checking=1 ; ac_gc_checking=1 ;
 471                         ac_gc_always_collect=1 ; ac_rtl_checking=1 ;
 472                         ac_rtlflag_checking=1 ; ac_runtime_checking=1 ;
 473                         ac_tree_checking=1 ; ac_valgrind_checking= ;;
 474         release)        ac_assert_checking=1 ; ac_checking= ;
 475                         ac_fold_checking= ; ac_gc_checking= ;
 476                         ac_gc_always_collect= ; ac_rtl_checking= ;
 477                         ac_rtlflag_checking= ; ac_runtime_checking=1 ;
 478                         ac_tree_checking= ; ac_valgrind_checking= ;;
 479         # these enable particular checks
 480         assert)         ac_assert_checking=1 ;;
 481         fold)           ac_fold_checking=1 ;;
 482         gc)             ac_gc_checking=1 ;;
 483         gcac)           ac_gc_always_collect=1 ;;
 484         misc)           ac_checking=1 ;;
 485         rtl)            ac_rtl_checking=1 ;;
 486         rtlflag)        ac_rtlflag_checking=1 ;;
 487         runtime)        ac_runtime_checking=1 ;;
 488         tree)           ac_tree_checking=1 ;;
 489         valgrind)       ac_valgrind_checking=1 ;;
 490         *)      AC_MSG_ERROR(unknown check category $check) ;;
 491         esac
 492 done
 493 IFS="$ac_save_IFS"
 494
 495 nocommon_flag=""
 496 if test x$ac_checking != x ; then
 497   AC_DEFINE(ENABLE_CHECKING, 1,
 498 [Define if you want more run-time sanity checks.  This one gets a grab
 499    bag of miscellaneous but relatively cheap checks.])
 500   nocommon_flag=-fno-common
 501 fi
 502 AC_SUBST(nocommon_flag)
 503 if test x$ac_assert_checking != x ; then
 504   AC_DEFINE(ENABLE_ASSERT_CHECKING, 1,
 505 [Define if you want assertions enabled.  This is a cheap check.])
 506 fi
 507 GCC_TARGET_TEMPLATE(ENABLE_RUNTIME_CHECKING)
 508 if test x$ac_runtime_checking != x ; then
 509   AC_DEFINE(ENABLE_RUNTIME_CHECKING, 1,
 510 [Define if you want runtime assertions enabled.  This is a cheap check.])
 511 fi
 512 if test x$ac_tree_checking != x ; then
 513   AC_DEFINE(ENABLE_TREE_CHECKING, 1,
 514 [Define if you want all operations on trees (the basic data
 515    structure of the front ends) to be checked for dynamic type safety
 516    at runtime.  This is moderately expensive.  The tree browser debugging
 517    routines will also be enabled by this option.
 518    ])
 519   TREEBROWSER=tree-browser.o
 520 fi
 521 AC_SUBST(TREEBROWSER)
 522 if test x$ac_rtl_checking != x ; then
 523   AC_DEFINE(ENABLE_RTL_CHECKING, 1,
 524 [Define if you want all operations on RTL (the basic data structure
 525    of the optimizer and back end) to be checked for dynamic type safety
 526    at runtime.  This is quite expensive.])
 527 fi
 528 if test x$ac_rtlflag_checking != x ; then
 529   AC_DEFINE(ENABLE_RTL_FLAG_CHECKING, 1,
 530 [Define if you want RTL flag accesses to be checked against the RTL
 531    codes that are supported for each access macro.  This is relatively
 532    cheap.])
 533 fi
 534 if test x$ac_gc_checking != x ; then
 535   AC_DEFINE(ENABLE_GC_CHECKING, 1,
 536 [Define if you want the garbage collector to do object poisoning and
 537    other memory allocation checks.  This is quite expensive.])
 538 fi
 539 if test x$ac_gc_always_collect != x ; then
 540   AC_DEFINE(ENABLE_GC_ALWAYS_COLLECT, 1,
 541 [Define if you want the garbage collector to operate in maximally
 542    paranoid mode, validating the entire heap and collecting garbage at
 543    every opportunity.  This is extremely expensive.])
 544 fi
 545 if test x$ac_fold_checking != x ; then
 546   AC_DEFINE(ENABLE_FOLD_CHECKING, 1,
 547 [Define if you want fold checked that it never destructs its argument.
 548    This is quite expensive.])
 549 fi
 550 valgrind_path_defines=
 551 valgrind_command=
 552
 553 dnl # This check AC_REQUIREs various stuff, so it *must not* be inside
 554 dnl # an if statement.  This was the source of very frustrating bugs
 555 dnl # in converting to autoconf 2.5x!
 556 AC_CHECK_HEADER(valgrind.h, have_valgrind_h=yes, have_valgrind_h=no)
 557
 558 if test x$ac_valgrind_checking != x ; then
 559   # It is certainly possible that there's valgrind but no valgrind.h.
 560   # GCC relies on making annotations so we must have both.
 561   AC_MSG_CHECKING(for VALGRIND_DISCARD in <valgrind/memcheck.h>)
 562   AC_PREPROC_IFELSE([AC_LANG_SOURCE(
 563     [[#include <valgrind/memcheck.h>
 564 #ifndef VALGRIND_DISCARD
 565 #error VALGRIND_DISCARD not defined
 566 #endif]])],
 567   [gcc_cv_header_valgrind_memcheck_h=yes],
 568   [gcc_cv_header_valgrind_memcheck_h=no])
 569   AC_MSG_RESULT($gcc_cv_header_valgrind_memcheck_h)
 570   AC_MSG_CHECKING(for VALGRIND_DISCARD in <memcheck.h>)
 571   AC_PREPROC_IFELSE([AC_LANG_SOURCE(
 572     [[#include <memcheck.h>
 573 #ifndef VALGRIND_DISCARD
 574 #error VALGRIND_DISCARD not defined
 575 #endif]])],
 576   [gcc_cv_header_memcheck_h=yes],
 577   [gcc_cv_header_memcheck_h=no])
 578   AC_MSG_RESULT($gcc_cv_header_memcheck_h)
 579   AM_PATH_PROG_WITH_TEST(valgrind_path, valgrind,
 580         [$ac_dir/$ac_word --version | grep valgrind- >/dev/null 2>&1])
 581   if test "x$valgrind_path" = "x" \
 582     || (test $have_valgrind_h = no \
 583         && test $gcc_cv_header_memcheck_h = no \
 584         && test $gcc_cv_header_valgrind_memcheck_h = no); then
 585         AC_MSG_ERROR([*** Can't find both valgrind and valgrind/memcheck.h, memcheck.h or valgrind.h])
 586   fi
 587   valgrind_path_defines=-DVALGRIND_PATH='\"'$valgrind_path'\"'
 588   valgrind_command="$valgrind_path -q"
 589   AC_DEFINE(ENABLE_VALGRIND_CHECKING, 1,
 590 [Define if you want to run subprograms and generated programs
 591    through valgrind (a memory checker).  This is extremely expensive.])
 592   if test $gcc_cv_header_valgrind_memcheck_h = yes; then
 593     AC_DEFINE(HAVE_VALGRIND_MEMCHECK_H, 1,
 594         [Define if valgrind's valgrind/memcheck.h header is installed.])
 595   fi
 596   if test $gcc_cv_header_memcheck_h = yes; then
 597     AC_DEFINE(HAVE_MEMCHECK_H, 1,
 598         [Define if valgrind's memcheck.h header is installed.])
 599   fi
 600 fi
 601 AC_SUBST(valgrind_path_defines)
 602 AC_SUBST(valgrind_command)
 603
 604 AC_ARG_ENABLE(mapped-location,
 605 [  --enable-mapped-location   location_t is fileline integer cookie],,
 606 enable_mapped_location=no)
 607
 608 if test "$enable_mapped_location" = yes ; then
 609   AC_DEFINE(USE_MAPPED_LOCATION, 1,
 610 [Define if location_t is fileline integer cookie.])
 611 fi
 612
 613 # Enable code coverage collection
 614 AC_ARG_ENABLE(coverage,
 615 [  --enable-coverage[=LEVEL]
 616                           enable compiler's code coverage collection.
 617                           Use to measure compiler performance and locate
 618                           unused parts of the compiler. With LEVEL, specify
 619                           optimization. Values are opt, noopt,
 620                           default is noopt],
 621 [case "${enableval}" in
 622   yes|noopt)
 623     coverage_flags="-fprofile-arcs -ftest-coverage -frandom-seed=\$@ -O0"
 624     ;;
 625   opt)
 626     coverage_flags="-fprofile-arcs -ftest-coverage -frandom-seed=\$@ -O2"
 627     ;;
 628   no)
 629     # a.k.a. --disable-coverage
 630     coverage_flags=""
 631     ;;
 632   *)
 633     AC_MSG_ERROR(unknown coverage setting $enableval)
 634     ;;
 635 esac],
 636 [coverage_flags=""])
 637 AC_SUBST(coverage_flags)
 638
 639 AC_ARG_ENABLE(gather-detailed-mem-stats,
 640 [  --enable-gather-detailed-mem-stats         enable detailed memory allocation stats gathering], [],
 641 [enable_gather_detailed_mem_stats=no])
 642 if test x$enable_gather_detailed_mem_stats = xyes ; then
 643   AC_DEFINE(GATHER_STATISTICS, 1,
 644         [Define to enable detailed memory allocation stats gathering.])
 645 fi
 646
 647 # -------------------------------
 648 # Miscenalleous configure options
 649 # -------------------------------
 650
 651 # With stabs
 652 AC_ARG_WITH(stabs,
 653 [  --with-stabs            arrange to use stabs instead of host debug format],
 654 stabs="$with_stabs",
 655 stabs=no)
 656
 657 # Determine whether or not multilibs are enabled.
 658 AC_ARG_ENABLE(multilib,
 659 [  --enable-multilib       enable library support for multiple ABIs],
 660 [], [enable_multilib=yes])
 661 AC_SUBST(enable_multilib)
 662
 663 # Enable __cxa_atexit for C++.
 664 AC_ARG_ENABLE(__cxa_atexit,
 665 [  --enable-__cxa_atexit   enable __cxa_atexit for C++],
 666 [], [])
 667
 668 # Enable C extension for decimal float if target supports it.
 669 AC_ARG_ENABLE(decimal-float,
 670 [  --enable-decimal-float  enable decimal float extension to C],
 671 [
 672   if test x$enablevar = xyes ; then
 673     case $target in
 674     powerpc*-*-linux* | i?86*-*-linux*)
 675       enable_decimal_float=yes
 676       ;;
 677     *)
 678       AC_MSG_WARN(decimal float is not supported for this target, ignored)
 679       enable_decimal_float=no
 680       ;;
 681     esac
 682   fi
 683 ], [enable_decimal_float=no])
 684
 685 AC_SUBST(enable_decimal_float)
 686
 687 dfp=`if test $enable_decimal_float = yes; then echo 1; else echo 0; fi`
 688 AC_DEFINE_UNQUOTED(ENABLE_DECIMAL_FLOAT, $dfp,
 689 [Define to 1 to enable decimal float extension to C.])
 690
 691 # Enable threads
 692 # Pass with no value to take the default
 693 # Pass with a value to specify a thread package
 694 AC_ARG_ENABLE(threads,
 695 [  --enable-threads        enable thread usage for target GCC
 696   --enable-threads=LIB    use LIB thread package for target GCC],,
 697 [enable_threads=''])
 698
 699 AC_ARG_ENABLE(tls,
 700 [  --enable-tls            enable or disable generation of tls code
 701                           overriding the assembler check for tls support],
 702 [
 703   case $enable_tls in
 704     yes | no) ;;
 705     *) AC_MSG_ERROR(['$enable_tls' is an invalid value for --enable-tls.
 706 Valid choices are 'yes' and 'no'.]) ;;
 707   esac
 708 ], [enable_tls=''])
 709
 710 AC_ARG_ENABLE(objc-gc,
 711 [  --enable-objc-gc       enable the use of Boehm's garbage collector with
 712                           the GNU Objective-C runtime],
 713 if test x$enable_objc_gc = xno; then
 714         objc_boehm_gc=''
 715 else
 716         objc_boehm_gc=1
 717 fi,
 718 objc_boehm_gc='')
 719
 720 AC_ARG_WITH(dwarf2,
 721 [  --with-dwarf2           force the default debug format to be DWARF 2],
 722 dwarf2="$with_dwarf2",
 723 dwarf2=no)
 724
 725 AC_ARG_ENABLE(shared,
 726 [  --disable-shared        don't provide a shared libgcc],
 727 [
 728   case $enable_shared in
 729   yes | no) ;;
 730   *)
 731     enable_shared=no
 732     IFS="${IFS=         }"; ac_save_ifs="$IFS"; IFS="${IFS}:,"
 733     for pkg in $enableval; do
 734       if test "X$pkg" = "Xgcc" || test "X$pkg" = "Xlibgcc"; then
 735         enable_shared=yes
 736       fi
 737     done
 738     IFS="$ac_save_ifs"
 739     ;;
 740   esac
 741 ], [enable_shared=yes])
 742 AC_SUBST(enable_shared)
 743
 744 AC_ARG_WITH(build-sysroot,
 745   [  --with-build-sysroot=sysroot
 746                           use sysroot as the system root during the build])
 747
 748 AC_ARG_WITH(sysroot,
 749 [  --with-sysroot[=DIR] Search for usr/lib, usr/include, et al, within DIR.],
 750 [
 751  case ${with_sysroot} in
 752  yes) TARGET_SYSTEM_ROOT='${exec_prefix}/${target_noncanonical}/sys-root' ;;
 753  *) TARGET_SYSTEM_ROOT=$with_sysroot ;;
 754  esac
 755
 756  TARGET_SYSTEM_ROOT_DEFINE='-DTARGET_SYSTEM_ROOT=\"$(TARGET_SYSTEM_ROOT)\"'
 757  CROSS_SYSTEM_HEADER_DIR='$(TARGET_SYSTEM_ROOT)$(NATIVE_SYSTEM_HEADER_DIR)'
 758
 759  if test "x$exec_prefix" = xNONE; then
 760   if test "x$prefix" = xNONE; then
 761    test_prefix=/usr/local
 762   else
 763    test_prefix=$prefix
 764   fi
 765  else
 766   test_prefix=$exec_prefix
 767  fi
 768  case ${TARGET_SYSTEM_ROOT} in
 769  "${test_prefix}"|"${test_prefix}/"*|\
 770  '${exec_prefix}'|'${exec_prefix}/'*)
 771    t="$TARGET_SYSTEM_ROOT_DEFINE -DTARGET_SYSTEM_ROOT_RELOCATABLE"
 772    TARGET_SYSTEM_ROOT_DEFINE="$t"
 773    ;;
 774  esac
 775 ], [
 776  TARGET_SYSTEM_ROOT=
 777  TARGET_SYSTEM_ROOT_DEFINE=
 778  CROSS_SYSTEM_HEADER_DIR='$(gcc_tooldir)/sys-include'
 779 ])
 780 AC_SUBST(TARGET_SYSTEM_ROOT)
 781 AC_SUBST(TARGET_SYSTEM_ROOT_DEFINE)
 782 AC_SUBST(CROSS_SYSTEM_HEADER_DIR)
 783
 784 # Build with intermodule optimisations
 785 AC_ARG_ENABLE(intermodule,
 786 [  --enable-intermodule    build the compiler in one step],
 787 [case ${enable_intermodule} in
 788   yes) onestep="-onestep";;
 789   *) onestep="";;
 790 esac],
 791 [onestep=""])
 792 AC_SUBST(onestep)
 793
 794 # Sanity check enable_languages in case someone does not run the toplevel
 795 # configure # script.
 796 AC_ARG_ENABLE(languages,
 797 [  --enable-languages=LIST specify which front-ends to build],
 798 [case ,${enable_languages}, in
 799        ,,|,yes,)
 800                 # go safe -- we cannot be much sure without the toplevel
 801                 # configure's
 802                 # analysis of which target libs are present and usable
 803                 enable_languages=c
 804                 ;;
 805          *,all,*)
 806                 AC_MSG_ERROR([only the toplevel supports --enable-languages=all])
 807                 ;;
 808         *,c,*)
 809                 ;;
 810         *)
 811                 enable_languages=c,${enable_languages}
 812                 ;;
 813 esac],
 814 [enable_languages=c])
 815
 816 # Used by documentation targets
 817 AC_SUBST(datarootdir)
 818 AC_SUBST(docdir)
 819 AC_SUBST(htmldir)
 820
 821 # -------------------------
 822 # Checks for other programs
 823 # -------------------------
 824
 825 AC_PROG_MAKE_SET
 826
 827 # Find some useful tools
 828 AC_PROG_AWK
 829 # We need awk to create options.c and options.h.
 830 # Bail out if it's missing.
 831 case ${AWK} in
 832   "") AC_MSG_ERROR([can't build without awk, bailing out]) ;;
 833 esac
 834
 835 gcc_AC_PROG_LN_S
 836 ACX_PROG_LN($LN_S)
 837 AC_PROG_RANLIB
 838 case "${host}" in
 839 *-*-darwin*)
 840   # By default, the Darwin ranlib will not treat common symbols as
 841   # definitions when  building the archive table of contents.  Other
 842   # ranlibs do that; pass an option to the Darwin ranlib that makes
 843   # it behave similarly.
 844   ranlib_flags="-c"
 845   ;;
 846 *)
 847   ranlib_flags=""
 848 esac
 849 AC_SUBST(ranlib_flags)
 850
 851 gcc_AC_PROG_INSTALL
 852
 853 # See if cmp has --ignore-initial.
 854 gcc_AC_PROG_CMP_IGNORE_INITIAL
 855
 856 # See if we have the mktemp command.
 857 AC_CHECK_PROG(have_mktemp_command, mktemp, yes, no)
 858
 859 MISSING="${CONFIG_SHELL-/bin/sh} $srcdir/../missing"
 860
 861 # See if makeinfo has been installed and is modern enough
 862 # that we can use it.
 863 gcc_AC_CHECK_PROG_VER(MAKEINFO, makeinfo, --version,
 864   [GNU texinfo.* \([0-9][0-9.]*\)],
 865   [4.[4-9]*])
 866 if test $gcc_cv_prog_makeinfo_modern = no; then
 867   MAKEINFO="$MISSING makeinfo"
 868   AC_MSG_WARN([
 869 *** Makeinfo is missing or too old.
 870 *** Info documentation will not be built.])
 871   BUILD_INFO=
 872 else
 873   BUILD_INFO=info
 874 fi
 875 AC_SUBST(BUILD_INFO)
 876
 877 # Is pod2man recent enough to regenerate manpages?
 878 AC_MSG_CHECKING([for recent Pod::Man])
 879 if (perl -e 'use 1.10 Pod::Man') >/dev/null 2>&1; then
 880   AC_MSG_RESULT(yes)
 881   GENERATED_MANPAGES=generated-manpages
 882 else
 883   AC_MSG_RESULT(no)
 884   GENERATED_MANPAGES=
 885 fi
 886 AC_SUBST(GENERATED_MANPAGES)
 887
 888 # How about lex?
 889 dnl Don't use AC_PROG_LEX; we insist on flex.
 890 dnl LEXLIB is not useful in gcc.
 891 AC_CHECK_PROGS([FLEX], flex, [$MISSING flex])
 892
 893 # Bison?
 894 AC_CHECK_PROGS([BISON], bison, [$MISSING bison])
 895
 896 # Binutils are not build modules, unlike bison/flex/makeinfo.  So we
 897 # check for build == host before using them.
 898
 899 # NM
 900 if test x${build} = x${host} && test -f $srcdir/../binutils/nm.c \
 901   && test -d ../binutils ; then
 902   NM='$(objdir)/../binutils/nm-new'
 903 else
 904   AC_CHECK_PROG(NM, nm, nm, ${CONFIG_SHELL-/bin/sh} ${srcdir}/../missing nm)
 905 fi
 906
 907 # AR
 908 if test x${build} = x${host} && test -f $srcdir/../binutils/ar.c \
 909   && test -d ../binutils ; then
 910   AR='$(objdir)/../binutils/ar'
 911 else
 912   AC_CHECK_PROG(AR, ar, ar, ${CONFIG_SHELL-/bin/sh} ${srcdir}/../missing ar)
 913 fi
 914
 915
 916 # --------------------
 917 # Checks for C headers
 918 # --------------------
 919
 920 AC_MSG_CHECKING(for GNU C library)
 921 AC_CACHE_VAL(gcc_cv_glibc,
 922 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
 923   [[#include <features.h>]], [[
 924 #if ! (defined __GLIBC__ || defined __GNU_LIBRARY__)
 925 #error Not a GNU C library system
 926 #endif]])],
 927   [gcc_cv_glibc=yes],
 928   [gcc_cv_glibc=no])])
 929 AC_MSG_RESULT($gcc_cv_glibc)
 930 if test $gcc_cv_glibc = yes; then
 931   AC_DEFINE(_GNU_SOURCE, 1, [Always define this when using the GNU C Library])
 932 fi
 933
 934 # Need to reject headers which give warnings, so that the -Werror bootstrap
 935 # works later. *sigh*  This needs to come before all header checks.
 936 AC_PROG_CPP_WERROR
 937
 938 AC_HEADER_STDC
 939 AC_HEADER_TIME
 940 ACX_HEADER_STRING
 941 AC_HEADER_SYS_WAIT
 942 AC_CHECK_HEADERS(limits.h stddef.h string.h strings.h stdlib.h time.h iconv.h \
 943                  fcntl.h unistd.h sys/file.h sys/time.h sys/mman.h \
 944                  sys/resource.h sys/param.h sys/times.h sys/stat.h \
 945                  direct.h malloc.h langinfo.h ldfcn.h locale.h wchar.h)
 946
 947 # Check for thread headers.
 948 AC_CHECK_HEADER(thread.h, [have_thread_h=yes], [have_thread_h=])
 949 AC_CHECK_HEADER(pthread.h, [have_pthread_h=yes], [have_pthread_h=])
 950
 951 # These tests can't be done till we know if we have limits.h.
 952 gcc_AC_C_CHAR_BIT
 953 AC_C_BIGENDIAN
 954
 955 # --------
 956 # UNSORTED
 957 # --------
 958
 959
 960 # These libraries may be used by collect2.
 961 # We may need a special search path to get them linked.
 962 AC_CACHE_CHECK(for collect2 libraries, gcc_cv_collect2_libs,
 963 [save_LIBS="$LIBS"
 964 for libs in '' -lld -lmld \
 965                 '-L/usr/lib/cmplrs/cc2.11 -lmld' \
 966                 '-L/usr/lib/cmplrs/cc3.11 -lmld'
 967 do
 968         LIBS="$libs"
 969         AC_TRY_LINK_FUNC(ldopen,
 970                 [gcc_cv_collect2_libs="$libs"; break])
 971 done
 972 LIBS="$save_LIBS"
 973 test -z "$gcc_cv_collect2_libs" && gcc_cv_collect2_libs='none required'])
 974 case $gcc_cv_collect2_libs in
 975         "none required")        ;;
 976         *)      COLLECT2_LIBS=$gcc_cv_collect2_libs ;;
 977 esac
 978 AC_SUBST(COLLECT2_LIBS)
 979
 980 # When building Ada code on Alpha, we need exc_resume which is usually in
 981 # -lexc.  So test for it.
 982 save_LIBS="$LIBS"
 983 LIBS=
 984 AC_SEARCH_LIBS(exc_resume, exc)
 985 GNAT_LIBEXC="$LIBS"
 986 LIBS="$save_LIBS"
 987 AC_SUBST(GNAT_LIBEXC)
 988
 989 # Some systems put ldexp and frexp in libm instead of libc; assume
 990 # they're both in the same place.  jcf-dump needs them.
 991 save_LIBS="$LIBS"
 992 LIBS=
 993 AC_SEARCH_LIBS(ldexp, m)
 994 LDEXP_LIB="$LIBS"
 995 LIBS="$save_LIBS"
 996 AC_SUBST(LDEXP_LIB)
 997
 998 # Use <inttypes.h> only if it exists,
 999 # doesn't clash with <sys/types.h>, and declares intmax_t.
1000 AC_MSG_CHECKING(for inttypes.h)
1001 AC_CACHE_VAL(gcc_cv_header_inttypes_h,
1002 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
1003 [[#include <sys/types.h>
1004 #include <inttypes.h>]],
1005   [[intmax_t i = -1;]])],
1006   [gcc_cv_header_inttypes_h=yes],
1007   [gcc_cv_header_inttypes_h=no])])
1008 AC_MSG_RESULT($gcc_cv_header_inttypes_h)
1009 if test $gcc_cv_header_inttypes_h = yes; then
1010   AC_DEFINE(HAVE_INTTYPES_H, 1,
1011         [Define if you have a working <inttypes.h> header file.])
1012 fi
1013
1014 dnl Disabled until we have a complete test for buggy enum bitfields.
1015 dnl gcc_AC_C_ENUM_BF_UNSIGNED
1016
1017 define(gcc_UNLOCKED_FUNCS, clearerr_unlocked feof_unlocked dnl
1018   ferror_unlocked fflush_unlocked fgetc_unlocked fgets_unlocked dnl
1019   fileno_unlocked fprintf_unlocked fputc_unlocked fputs_unlocked dnl
1020   fread_unlocked fwrite_unlocked getchar_unlocked getc_unlocked dnl
1021   putchar_unlocked putc_unlocked)
1022 AC_CHECK_FUNCS(times clock kill getrlimit setrlimit atoll atoq \
1023         sysconf strsignal getrusage nl_langinfo scandir alphasort \
1024         gettimeofday mbstowcs wcswidth mmap mincore setlocale \
1025         gcc_UNLOCKED_FUNCS)
1026
1027 if test x$ac_cv_func_mbstowcs = xyes; then
1028   AC_CACHE_CHECK(whether mbstowcs works, gcc_cv_func_mbstowcs_works,
1029 [    AC_RUN_IFELSE([AC_LANG_SOURCE([[#include <stdlib.h>
1030 int main()
1031 {
1032   mbstowcs(0, "", 0);
1033   return 0;
1034 }]])],
1035     [gcc_cv_func_mbstowcs_works=yes],
1036     [gcc_cv_func_mbstowcs_works=no],
1037     [gcc_cv_func_mbstowcs_works=yes])])
1038   if test x$gcc_cv_func_mbstowcs_works = xyes; then
1039     AC_DEFINE(HAVE_WORKING_MBSTOWCS, 1,
1040   [Define this macro if mbstowcs does not crash when its
1041    first argument is NULL.])
1042   fi
1043 fi
1044
1045 AC_CHECK_TYPE(ssize_t, int)
1046
1047 # Try to determine the array type of the second argument of getgroups
1048 # for the target system (int or gid_t).
1049 AC_TYPE_GETGROUPS
1050 if test "${target}" = "${build}"; then
1051   TARGET_GETGROUPS_T=$ac_cv_type_getgroups
1052 else
1053   case "${target}" in
1054         # This condition may need some tweaking.  It should include all
1055         # targets where the array type of the second argument of getgroups
1056         # is int and the type of gid_t is not equivalent to int.
1057         *-*-sunos* | *-*-ultrix*)
1058                 TARGET_GETGROUPS_T=int
1059                 ;;
1060         *)
1061                 TARGET_GETGROUPS_T=gid_t
1062                 ;;
1063   esac
1064 fi
1065 AC_SUBST(TARGET_GETGROUPS_T)
1066
1067 gcc_AC_FUNC_MMAP_BLACKLIST
1068
1069 case "${host}" in
1070 *-*-*vms*)
1071   # Under VMS, vfork works very differently than on Unix. The standard test
1072   # won't work, and it isn't easily adaptable. It makes more sense to
1073   # just force it.
1074   ac_cv_func_vfork_works=yes
1075   ;;
1076 esac
1077 AC_FUNC_FORK
1078
1079 AM_ICONV
1080 # Until we have in-tree GNU iconv:
1081 LIBICONV_DEP=
1082 AC_SUBST(LIBICONV_DEP)
1083
1084 AM_LC_MESSAGES
1085
1086 AM_LANGINFO_CODESET
1087
1088 # We will need to find libiberty.h and ansidecl.h
1089 saved_CFLAGS="$CFLAGS"
1090 CFLAGS="$CFLAGS -I${srcdir} -I${srcdir}/../include"
1091 gcc_AC_CHECK_DECLS(getenv atol asprintf sbrk abort atof getcwd getwd \
1092         strsignal strstr strverscmp \
1093         errno snprintf vsnprintf vasprintf malloc realloc calloc \
1094         free basename getopt clock getpagesize gcc_UNLOCKED_FUNCS, , ,[
1095 #include "ansidecl.h"
1096 #include "system.h"])
1097
1098 gcc_AC_CHECK_DECLS(getrlimit setrlimit getrusage, , ,[
1099 #include "ansidecl.h"
1100 #include "system.h"
1101 #ifdef HAVE_SYS_RESOURCE_H
1102 #include <sys/resource.h>
1103 #endif
1104 ])
1105
1106 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1107 #include "ansidecl.h"
1108 #include "system.h"
1109 #ifdef HAVE_SYS_RESOURCE_H
1110 #include <sys/resource.h>
1111 #endif
1112 ]], [[rlim_t l = 0;]])],[],[AC_DEFINE([rlim_t],[long],
1113 [Define to \`long' if <sys/resource.h> doesn't define.])])
1114
1115 # On AIX 5.2, <ldfcn.h> conflicts with <fcntl.h>, as both define incompatible
1116 # FREAD and FWRITE macros.  Fortunately, for GCC's single usage of ldgetname
1117 # in collect2.c, <fcntl.h> isn't visible, but the configure test below needs
1118 # to undef these macros to get the correct value for HAVE_DECL_LDGETNAME.
1119 gcc_AC_CHECK_DECLS(ldgetname, , ,[
1120 #include "ansidecl.h"
1121 #include "system.h"
1122 #ifdef HAVE_LDFCN_H
1123 #undef FREAD
1124 #undef FWRITE
1125 #include <ldfcn.h>
1126 #endif
1127 ])
1128
1129 gcc_AC_CHECK_DECLS(times, , ,[
1130 #include "ansidecl.h"
1131 #include "system.h"
1132 #ifdef HAVE_SYS_TIMES_H
1133 #include <sys/times.h>
1134 #endif
1135 ])
1136
1137 gcc_AC_CHECK_DECLS(sigaltstack, , ,[
1138 #include "ansidecl.h"
1139 #include "system.h"
1140 #include <signal.h>
1141 ])
1142
1143 # More time-related stuff.
1144 AC_CACHE_CHECK(for struct tms, ac_cv_struct_tms, [
1145 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1146 #include "ansidecl.h"
1147 #include "system.h"
1148 #ifdef HAVE_SYS_TIMES_H
1149 #include <sys/times.h>
1150 #endif
1151 ]], [[struct tms tms;]])],[ac_cv_struct_tms=yes],[ac_cv_struct_tms=no])])
1152 if test $ac_cv_struct_tms = yes; then
1153   AC_DEFINE(HAVE_STRUCT_TMS, 1,
1154   [Define if <sys/times.h> defines struct tms.])
1155 fi
1156
1157 # use gcc_cv_* here because this doesn't match the behavior of AC_CHECK_TYPE.
1158 # revisit after autoconf 2.50.
1159 AC_CACHE_CHECK(for clock_t, gcc_cv_type_clock_t, [
1160 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1161 #include "ansidecl.h"
1162 #include "system.h"
1163 ]], [[clock_t x;]])],[gcc_cv_type_clock_t=yes],[gcc_cv_type_clock_t=no])])
1164 if test $gcc_cv_type_clock_t = yes; then
1165   AC_DEFINE(HAVE_CLOCK_T, 1,
1166   [Define if <time.h> defines clock_t.])
1167 fi
1168
1169 # Restore CFLAGS from before the gcc_AC_NEED_DECLARATIONS tests.
1170 CFLAGS="$saved_CFLAGS"
1171
1172 gcc_AC_INITFINI_ARRAY
1173
1174 # mkdir takes a single argument on some systems.
1175 gcc_AC_FUNC_MKDIR_TAKES_ONE_ARG
1176
1177 # File extensions
1178 manext='.1'
1179 objext='.o'
1180 AC_SUBST(manext)
1181 AC_SUBST(objext)
1182
1183 # With Setjmp/Longjmp based exception handling.
1184 AC_ARG_ENABLE(sjlj-exceptions,
1185 [  --enable-sjlj-exceptions
1186                           arrange to use setjmp/longjmp exception handling],
1187 [sjlj=`if test $enableval = yes; then echo 1; else echo 0; fi`
1188 AC_DEFINE_UNQUOTED(CONFIG_SJLJ_EXCEPTIONS, $sjlj,
1189   [Define 0/1 to force the choice for exception handling model.])])
1190
1191 # For platforms with the unwind ABI which includes an unwind library,
1192 # libunwind, we can choose to use the system libunwind.
1193 AC_ARG_WITH(system-libunwind,
1194 [  --with-system-libunwind use installed libunwind])
1195
1196 # config.gcc also contains tests of with_system_libunwind.
1197 if test x$with_system_libunwind = xyes; then
1198         AC_DEFINE(HAVE_GETIPINFO, 1,
1199 [Define to 1 if system unwind library has _Unwind_GetIPInfo.])
1200 fi
1201
1202 # --------------------------------------------------------
1203 # Build, host, and target specific configuration fragments
1204 # --------------------------------------------------------
1205
1206 # Collect build-machine-specific information.
1207 . ${srcdir}/config.build
1208
1209 # Collect host-machine-specific information.
1210 . ${srcdir}/config.host
1211
1212 target_gtfiles=
1213
1214 # Collect target-machine-specific information.
1215 . ${srcdir}/config.gcc
1216
1217 extra_objs="${host_extra_objs} ${extra_objs}"
1218 extra_gcc_objs="${host_extra_gcc_objs} ${extra_gcc_objs}"
1219
1220 # Default the target-machine variables that were not explicitly set.
1221 if test x"$tm_file" = x
1222 then tm_file=$cpu_type/$cpu_type.h; fi
1223
1224 if test x"$extra_headers" = x
1225 then extra_headers=; fi
1226
1227 if test x$md_file = x
1228 then md_file=$cpu_type/$cpu_type.md; fi
1229
1230 if test x$out_file = x
1231 then out_file=$cpu_type/$cpu_type.c; fi
1232
1233 if test x"$tmake_file" = x
1234 then tmake_file=$cpu_type/t-$cpu_type
1235 fi
1236
1237 if test x"$dwarf2" = xyes
1238 then tm_file="$tm_file tm-dwarf2.h"
1239 fi
1240
1241 # Say what files are being used for the output code and MD file.
1242 echo "Using \`$srcdir/config/$out_file' for machine-specific logic."
1243 echo "Using \`$srcdir/config/$md_file' as machine description file."
1244
1245 # If any of the xm_file variables contain nonexistent files, warn
1246 # about them and drop them.
1247
1248 bx=
1249 for x in $build_xm_file; do
1250   if    test -f $srcdir/config/$x
1251   then      bx="$bx $x"
1252   else      AC_MSG_WARN($srcdir/config/$x does not exist.)
1253   fi
1254 done
1255 build_xm_file="$bx"
1256
1257 hx=
1258 for x in $host_xm_file; do
1259   if    test -f $srcdir/config/$x
1260   then      hx="$hx $x"
1261   else      AC_MSG_WARN($srcdir/config/$x does not exist.)
1262   fi
1263 done
1264 host_xm_file="$hx"
1265
1266 tx=
1267 for x in $xm_file; do
1268   if    test -f $srcdir/config/$x
1269   then      tx="$tx $x"
1270   else      AC_MSG_WARN($srcdir/config/$x does not exist.)
1271   fi
1272 done
1273 xm_file="$tx"
1274
1275 count=a
1276 for f in $tm_file; do
1277         count=${count}x
1278 done
1279 if test $count = ax; then
1280         echo "Using \`$srcdir/config/$tm_file' as target machine macro file."
1281 else
1282         echo "Using the following target machine macro files:"
1283         for f in $tm_file; do
1284                 echo "  $srcdir/config/$f"
1285         done
1286 fi
1287
1288 if test x$need_64bit_hwint = xyes; then
1289         AC_DEFINE(NEED_64BIT_HOST_WIDE_INT, 1,
1290 [Define to 1 if HOST_WIDE_INT must be 64 bits wide (see hwint.h).])
1291 fi
1292
1293 if test x$use_long_long_for_widest_fast_int = xyes; then
1294         AC_DEFINE(USE_LONG_LONG_FOR_WIDEST_FAST_INT, 1,
1295 [Define to 1 if the 'long long' (or '__int64') is wider than 'long' but still
1296 efficiently supported by the host hardware.])
1297 fi
1298
1299 count=a
1300 for f in $host_xm_file; do
1301         count=${count}x
1302 done
1303 if test $count = a; then
1304         :
1305 elif test $count = ax; then
1306         echo "Using \`$srcdir/config/$host_xm_file' as host machine macro file."
1307 else
1308         echo "Using the following host machine macro files:"
1309         for f in $host_xm_file; do
1310                 echo "  $srcdir/config/$f"
1311         done
1312 fi
1313 echo "Using ${out_host_hook_obj} for host machine hooks."
1314
1315 if test "$host_xm_file" != "$build_xm_file"; then
1316         count=a
1317         for f in $build_xm_file; do
1318                 count=${count}x
1319         done
1320         if test $count = a; then
1321                 :
1322         elif test $count = ax; then
1323                 echo "Using \`$srcdir/config/$build_xm_file' as build machine macro file."
1324         else
1325                 echo "Using the following build machine macro files:"
1326                 for f in $build_xm_file; do
1327                         echo "  $srcdir/config/$f"
1328                 done
1329         fi
1330 fi
1331
1332 case ${host} in
1333   powerpc*-*-darwin*)
1334     AC_CACHE_CHECK([whether mcontext_t fields have underscores],
1335       gcc_cv_mcontext_underscores,
1336       AC_COMPILE_IFELSE([
1337 #include <sys/cdefs.h>
1338 #include <sys/signal.h>
1339 #include <ucontext.h>
1340 int main() { mcontext_t m; if (m->ss.srr0) return 0; return 0; }
1341 ],
1342         gcc_cv_mcontext_underscores=no, gcc_cv_mcontext_underscores=yes))
1343       if test $gcc_cv_mcontext_underscores = yes; then
1344         AC_DEFINE(HAS_MCONTEXT_T_UNDERSCORES,,dnl
1345           [mcontext_t fields start with __])
1346       fi
1347     ;;
1348 esac
1349
1350 # ---------
1351 # Threading
1352 # ---------
1353
1354 # Check if a valid thread package
1355 case ${enable_threads} in
1356   "" | no)
1357     # No threads
1358     target_thread_file='single'
1359     ;;
1360   yes)
1361     # default
1362     target_thread_file='single'
1363     ;;
1364   aix | dce | gnat | irix | posix | posix95 | rtems | \
1365   single | solaris | vxworks | win32 )
1366     target_thread_file=${enable_threads}
1367     ;;
1368   *)
1369     echo "${enable_threads} is an unknown thread package" 1>&2
1370     exit 1
1371     ;;
1372 esac
1373
1374 if test x${thread_file} = x; then
1375   # No thread file set by target-specific clauses in config.gcc,
1376   # so use file chosen by default logic above
1377   thread_file=${target_thread_file}
1378 fi
1379
1380 # Make gthr-default.h if we have a thread file.
1381 gthread_flags=
1382 if test $thread_file != single; then
1383   rm -f gthr-default.h
1384   echo "#include \"gthr-${thread_file}.h\"" > gthr-default.h
1385   gthread_flags=-DHAVE_GTHR_DEFAULT
1386 fi
1387 AC_SUBST(gthread_flags)
1388
1389 # --------
1390 # UNSORTED
1391 # --------
1392
1393 use_cxa_atexit=no
1394 if test x$enable___cxa_atexit = xyes || \
1395    test x$enable___cxa_atexit = x -a x$default_use_cxa_atexit = xyes; then
1396   if test x$host = x$target; then
1397     case $host in
1398       # mingw32 doesn't have __cxa_atexit but uses atexit registration
1399       # keyed to flag_use_cxa_atexit
1400       *-*-mingw32*)
1401         use_cxa_atexit=yes
1402         ;;
1403       *)
1404         AC_CHECK_FUNC(__cxa_atexit,[use_cxa_atexit=yes],
1405           [echo "__cxa_atexit can't be enabled on this target"])
1406         ;;
1407     esac
1408   else
1409     # We can't check for __cxa_atexit when building a cross, so assume
1410     # it is available
1411     use_cxa_atexit=yes
1412   fi
1413   if test x$use_cxa_atexit = xyes; then
1414     AC_DEFINE(DEFAULT_USE_CXA_ATEXIT, 2,
1415       [Define if you want to use __cxa_atexit, rather than atexit, to
1416       register C++ destructors for local statics and global objects.
1417       This is essential for fully standards-compliant handling of
1418       destructors, but requires __cxa_atexit in libc.])
1419   fi
1420 fi
1421
1422 use_getipinfo=yes
1423 if test x$with_system_libunwind = xyes; then
1424    if test x$host = x$target; then
1425      AC_SEARCH_LIBS(_Unwind_GetIPInfo, unwind,, [use_getipinfo=no])
1426    fi
1427 fi
1428 GCC_TARGET_TEMPLATE(HAVE_GETIPINFO)
1429 if test x$use_getipinfo = xyes; then
1430    AC_DEFINE(HAVE_GETIPINFO, 1,
1431         [Define to 1 if system unwind library has _Unwind_GetIPInfo.])
1432 else
1433    echo "The system unwind library does not support _Unwind_GetIPInfo."
1434 fi
1435
1436 # Look for a file containing extra machine modes.
1437 if test -n "$extra_modes" && test -f $srcdir/config/$extra_modes; then
1438   extra_modes_file='$(srcdir)'/config/${extra_modes}
1439   AC_SUBST(extra_modes_file)
1440   AC_DEFINE_UNQUOTED(EXTRA_MODES_FILE, "config/$extra_modes",
1441   [Define to the name of a file containing a list of extra machine modes
1442    for this architecture.])
1443 fi
1444
1445 # Convert extra_options into a form suitable for Makefile use.
1446 extra_opt_files=
1447 for f in $extra_options; do
1448   extra_opt_files="$extra_opt_files \$(srcdir)/config/$f"
1449 done
1450 AC_SUBST(extra_opt_files)
1451
1452 # auto-host.h is the file containing items generated by autoconf and is
1453 # the first file included by config.h.
1454 # If host=build, it is correct to have bconfig include auto-host.h
1455 # as well.  If host!=build, we are in error and need to do more
1456 # work to find out the build config parameters.
1457 if test x$host = x$build
1458 then
1459         build_auto=auto-host.h
1460 else
1461         # We create a subdir, then run autoconf in the subdir.
1462         # To prevent recursion we set host and build for the new
1463         # invocation of configure to the build for this invocation
1464         # of configure.
1465         tempdir=build.$$
1466         rm -rf $tempdir
1467         mkdir $tempdir
1468         cd $tempdir
1469         case ${srcdir} in
1470         /* | [A-Za-z]:[\\/]* ) realsrcdir=${srcdir};;
1471         *) realsrcdir=../${srcdir};;
1472         esac
1473         saved_CFLAGS="${CFLAGS}"
1474         CC="${CC_FOR_BUILD}" CFLAGS="${CFLAGS_FOR_BUILD}" \
1475         ${realsrcdir}/configure \
1476                 --enable-languages=${enable_languages-all} \
1477                 --target=$target_alias --host=$build_alias --build=$build_alias
1478         CFLAGS="${saved_CFLAGS}"
1479
1480         # We just finished tests for the build machine, so rename
1481         # the file auto-build.h in the gcc directory.
1482         mv auto-host.h ../auto-build.h
1483         cd ..
1484         rm -rf $tempdir
1485         build_auto=auto-build.h
1486 fi
1487 AC_SUBST(build_subdir)
1488
1489 tm_file="${tm_file} defaults.h"
1490 tm_p_file="${tm_p_file} tm-preds.h"
1491 host_xm_file="auto-host.h ansidecl.h ${host_xm_file}"
1492 build_xm_file="${build_auto} ansidecl.h ${build_xm_file}"
1493 # We don't want ansidecl.h in target files, write code there in ISO/GNU C.
1494 # put this back in temporarily.
1495 xm_file="auto-host.h ansidecl.h ${xm_file}"
1496
1497 # --------
1498 # UNSORTED
1499 # --------
1500
1501 changequote(,)dnl
1502 # Compile in configure arguments.
1503 if test -f configargs.h ; then
1504         # Being re-configured.
1505         gcc_config_arguments=`grep configuration_arguments configargs.h | sed -e 's/.*"\([^"]*\)".*/\1/'`
1506         gcc_config_arguments="$gcc_config_arguments : (reconfigured) $TOPLEVEL_CONFIGURE_ARGUMENTS"
1507 else
1508         gcc_config_arguments="$TOPLEVEL_CONFIGURE_ARGUMENTS"
1509 fi
1510
1511 # Double all backslashes and backslash all quotes to turn
1512 # gcc_config_arguments into a C string.
1513 sed -e 's/\\/\\\\/g; s/"/\\"/g' <<EOF >conftest.out
1514 $gcc_config_arguments
1515 EOF
1516 gcc_config_arguments_str=`cat conftest.out`
1517 rm -f conftest.out
1518
1519 cat > configargs.h <<EOF
1520 /* Generated automatically. */
1521 static const char configuration_arguments[] = "$gcc_config_arguments_str";
1522 static const char thread_model[] = "$thread_file";
1523
1524 static const struct {
1525   const char *name, *value;
1526 } configure_default_options[] = $configure_default_options;
1527 EOF
1528 changequote([,])dnl
1529
1530 # Internationalization
1531 ZW_GNU_GETTEXT_SISTER_DIR
1532
1533 # If LIBINTL contains LIBICONV, then clear LIBICONV so we don't get
1534 # -liconv on the link line twice.
1535 case "$LIBINTL" in *$LIBICONV*)
1536         LIBICONV= ;;
1537 esac
1538
1539 AC_ARG_ENABLE(secureplt,
1540 [  --enable-secureplt      enable -msecure-plt by default for PowerPC],
1541 [], [])
1542
1543 # Windows32 Registry support for specifying GCC installation paths.
1544 AC_ARG_ENABLE(win32-registry,
1545 [  --disable-win32-registry
1546                           disable lookup of installation paths in the
1547                           Registry on Windows hosts
1548   --enable-win32-registry enable registry lookup (default)
1549   --enable-win32-registry=KEY
1550                           use KEY instead of GCC version as the last portion
1551                           of the registry key],,)
1552
1553 case $host_os in
1554   win32 | pe | cygwin* | mingw32* | uwin*)
1555     if test "x$enable_win32_registry" != xno; then
1556       AC_SEARCH_LIBS(RegOpenKeyExA, advapi32,, [enable_win32_registry=no])
1557     fi
1558
1559     if test "x$enable_win32_registry" != xno; then
1560       AC_DEFINE(ENABLE_WIN32_REGISTRY, 1,
1561   [Define to 1 if installation paths should be looked up in the Windows
1562    Registry. Ignored on non-Windows hosts.])
1563
1564       if test "x$enable_win32_registry" != xyes \
1565          && test "x$enable_win32_registry" != x; then
1566         AC_DEFINE_UNQUOTED(WIN32_REGISTRY_KEY, "$enable_win32_registry",
1567   [Define to be the last component of the Windows registry key under which
1568    to look for installation paths.  The full key used will be
1569    HKEY_LOCAL_MACHINE/SOFTWARE/Free Software Foundation/{WIN32_REGISTRY_KEY}.
1570    The default is the GCC version number.])
1571       fi
1572     fi
1573   ;;
1574 esac
1575
1576 # Get an absolute path to the GCC top-level source directory
1577 holddir=`${PWDCMD-pwd}`
1578 cd $srcdir
1579 topdir=`${PWDCMD-pwd}`
1580 cd $holddir
1581
1582 # Conditionalize the makefile for this host machine.
1583 xmake_file=
1584 for f in ${host_xmake_file}
1585 do
1586         if test -f ${srcdir}/config/$f
1587         then
1588                 xmake_file="${xmake_file} \$(srcdir)/config/$f"
1589         fi
1590 done
1591
1592 # Conditionalize the makefile for this target machine.
1593 tmake_file_=
1594 for f in ${tmake_file}
1595 do
1596         if test -f ${srcdir}/config/$f
1597         then
1598                 tmake_file_="${tmake_file_} \$(srcdir)/config/$f"
1599         fi
1600 done
1601 tmake_file="${tmake_file_}"
1602
1603 # This is a terrible hack which will go away some day.
1604 host_cc_for_libada=${CC}
1605 AC_SUBST(host_cc_for_libada)
1606
1607 out_object_file=`basename $out_file .c`.o
1608
1609 tm_file_list="options.h"
1610 tm_include_list="options.h"
1611 for f in $tm_file; do
1612   case $f in
1613     defaults.h )
1614        tm_file_list="${tm_file_list} \$(srcdir)/$f"
1615        tm_include_list="${tm_include_list} $f"
1616        ;;
1617     * )
1618        tm_file_list="${tm_file_list} \$(srcdir)/config/$f"
1619        tm_include_list="${tm_include_list} config/$f"
1620        ;;
1621   esac
1622 done
1623
1624 tm_p_file_list=
1625 tm_p_include_list=
1626 for f in $tm_p_file; do
1627   case $f in
1628     tm-preds.h )
1629        tm_p_file_list="${tm_p_file_list} $f"
1630        tm_p_include_list="${tm_p_include_list} $f"
1631        ;;
1632     * )
1633        tm_p_file_list="${tm_p_file_list} \$(srcdir)/config/$f"
1634        tm_p_include_list="${tm_p_include_list} config/$f"
1635   esac
1636 done
1637
1638 xm_file_list=
1639 xm_include_list=
1640 for f in $xm_file; do
1641   case $f in
1642     ansidecl.h )
1643        xm_file_list="${xm_file_list} \$(srcdir)/../include/$f"
1644        xm_include_list="${xm_include_list} $f"
1645        ;;
1646     auto-host.h )
1647        xm_file_list="${xm_file_list} $f"
1648        xm_include_list="${xm_include_list} $f"
1649        ;;
1650     * )
1651        xm_file_list="${xm_file_list} \$(srcdir)/config/$f"
1652        xm_include_list="${xm_include_list} config/$f"
1653        ;;
1654   esac
1655 done
1656
1657 host_xm_file_list=
1658 host_xm_include_list=
1659 for f in $host_xm_file; do
1660   case $f in
1661     ansidecl.h )
1662        host_xm_file_list="${host_xm_file_list} \$(srcdir)/../include/$f"
1663        host_xm_include_list="${host_xm_include_list} $f"
1664        ;;
1665     auto-host.h )
1666        host_xm_file_list="${host_xm_file_list} $f"
1667        host_xm_include_list="${host_xm_include_list} $f"
1668        ;;
1669     * )
1670        host_xm_file_list="${host_xm_file_list} \$(srcdir)/config/$f"
1671        host_xm_include_list="${host_xm_include_list} config/$f"
1672        ;;
1673   esac
1674 done
1675
1676 build_xm_file_list=
1677 for f in $build_xm_file; do
1678   case $f in
1679     ansidecl.h )
1680        build_xm_file_list="${build_xm_file_list} \$(srcdir)/../include/$f"
1681        build_xm_include_list="${build_xm_include_list} $f"
1682        ;;
1683     auto-build.h | auto-host.h )
1684        build_xm_file_list="${build_xm_file_list} $f"
1685        build_xm_include_list="${build_xm_include_list} $f"
1686        ;;
1687     * )
1688        build_xm_file_list="${build_xm_file_list} \$(srcdir)/config/$f"
1689        build_xm_include_list="${build_xm_include_list} config/$f"
1690        ;;
1691   esac
1692 done
1693
1694 # Define macro CROSS_DIRECTORY_STRUCTURE in compilation if this is a
1695 # cross-compiler which does not use the native headers and libraries.
1696 # Also use all.cross instead of all.internal and adjust SYSTEM_HEADER_DIR.
1697 CROSS=                                          AC_SUBST(CROSS)
1698 ALL=all.internal                                AC_SUBST(ALL)
1699 SYSTEM_HEADER_DIR='$(NATIVE_SYSTEM_HEADER_DIR)' AC_SUBST(SYSTEM_HEADER_DIR)
1700
1701 if test "x$with_build_sysroot" != x; then
1702   build_system_header_dir=$with_build_sysroot'$(NATIVE_SYSTEM_HEADER_DIR)'
1703 else
1704   # This value is used, even on a native system, because
1705   # CROSS_SYSTEM_HEADER_DIR is just
1706   # $(TARGET_SYSTEM_ROOT)$(NATIVE_SYSTEM_HEADER_DIR).
1707   build_system_header_dir='$(CROSS_SYSTEM_HEADER_DIR)'
1708 fi
1709
1710 if test x$host != x$target
1711 then
1712         CROSS="-DCROSS_DIRECTORY_STRUCTURE"
1713         ALL=all.cross
1714         SYSTEM_HEADER_DIR=$build_system_header_dir
1715         case "$host","$target" in
1716         # Darwin crosses can use the host system's libraries and headers,
1717         # because of the fat library support.  Of course, it must be the
1718         # same version of Darwin on both sides.  Allow the user to
1719         # just say --target=foo-darwin without a version number to mean
1720         # "the version on this system".
1721             *-*-darwin*,*-*-darwin*)
1722                 hostos=`echo $host | sed 's/.*-darwin/darwin/'`
1723                 targetos=`echo $target | sed 's/.*-darwin/darwin/'`
1724                 if test $hostos = $targetos -o $targetos = darwin ; then
1725                     CROSS=
1726                     SYSTEM_HEADER_DIR='$(NATIVE_SYSTEM_HEADER_DIR)'
1727                     with_headers=yes
1728                 fi
1729                 ;;
1730
1731             i?86-*-*,x86_64-*-* \
1732             | powerpc*-*-*,powerpc64*-*-*)
1733                 CROSS="$CROSS -DNATIVE_CROSS" ;;
1734         esac
1735 elif test "x$TARGET_SYSTEM_ROOT" != x; then
1736         SYSTEM_HEADER_DIR=$build_system_header_dir
1737 fi
1738
1739 # If this is a cross-compiler that does not
1740 # have its own set of headers then define
1741 # inhibit_libc
1742
1743 # If this is using newlib, without having the headers available now,
1744 # then define inhibit_libc in LIBGCC2_CFLAGS.
1745 # This prevents libgcc2 from containing any code which requires libc
1746 # support.
1747 inhibit_libc=false
1748 if { { test x$host != x$target && test "x$with_sysroot" = x ; } ||
1749        test x$with_newlib = xyes ; } &&
1750      { test "x$with_headers" = x || test "x$with_headers" = xno ; } ; then
1751        inhibit_libc=true
1752 fi
1753 AC_SUBST(inhibit_libc)
1754
1755 # When building gcc with a cross-compiler, we need to adjust things so
1756 # that the generator programs are still built with the native compiler.
1757 # Also, we cannot run fixincludes or fix-header.
1758
1759 # These are the normal (build=host) settings:
1760 CC_FOR_BUILD='$(CC)'            AC_SUBST(CC_FOR_BUILD)
1761 BUILD_CFLAGS='$(ALL_CFLAGS)'    AC_SUBST(BUILD_CFLAGS)
1762 STMP_FIXINC=stmp-fixinc         AC_SUBST(STMP_FIXINC)
1763
1764 # Possibly disable fixproto, on a per-target basis.
1765 case ${use_fixproto} in
1766   no)
1767     STMP_FIXPROTO=
1768     ;;
1769   yes)
1770     STMP_FIXPROTO=stmp-fixproto
1771     ;;
1772 esac
1773 AC_SUBST(STMP_FIXPROTO)
1774
1775 # And these apply if build != host, or we are generating coverage data
1776 if test x$build != x$host || test "x$coverage_flags" != x
1777 then
1778     BUILD_CFLAGS='$(INTERNAL_CFLAGS) $(T_CFLAGS) $(CFLAGS_FOR_BUILD)'
1779
1780     if test "x$TARGET_SYSTEM_ROOT" = x; then
1781         if test "x$STMP_FIXPROTO" != x; then
1782           STMP_FIXPROTO=stmp-install-fixproto
1783         fi
1784     fi
1785 fi
1786
1787 # Expand extra_headers to include complete path.
1788 # This substitutes for lots of t-* files.
1789 extra_headers_list=
1790 # Prepend $(srcdir)/config/${cpu_type}/ to every entry in extra_headers.
1791 for file in ${extra_headers} ; do
1792   extra_headers_list="${extra_headers_list} \$(srcdir)/config/${cpu_type}/${file}"
1793 done
1794
1795 # Define collect2 in Makefile.
1796 case $host_can_use_collect2 in
1797   no) collect2= ;;
1798   *) collect2='collect2$(exeext)' ;;
1799 esac
1800 AC_SUBST([collect2])
1801
1802 # Add a definition of USE_COLLECT2 if system wants one.
1803 case $use_collect2 in
1804   no) use_collect2= ;;
1805   "") ;;
1806   *)
1807     host_xm_defines="${host_xm_defines} USE_COLLECT2"
1808     xm_defines="${xm_defines} USE_COLLECT2"
1809     case $host_can_use_collect2 in
1810       no)
1811         AC_MSG_ERROR([collect2 is required but cannot be built on this system])
1812         ;;
1813     esac
1814     ;;
1815 esac
1816
1817 # ---------------------------
1818 # Assembler & linker features
1819 # ---------------------------
1820
1821 # Identify the assembler which will work hand-in-glove with the newly
1822 # built GCC, so that we can examine its features.  This is the assembler
1823 # which will be driven by the driver program.
1824 #
1825 # If build != host, and we aren't building gas in-tree, we identify a
1826 # build->target assembler and hope that it will have the same features
1827 # as the host->target assembler we'll be using.
1828 gcc_cv_gas_major_version=
1829 gcc_cv_gas_minor_version=
1830 gcc_cv_as_gas_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/gas
1831
1832 m4_pattern_allow([AS_FOR_TARGET])dnl
1833 AS_VAR_SET_IF(gcc_cv_as,, [
1834 if test -x "$DEFAULT_ASSEMBLER"; then
1835         gcc_cv_as="$DEFAULT_ASSEMBLER"
1836 elif test -f $gcc_cv_as_gas_srcdir/configure.in \
1837      && test -f ../gas/Makefile \
1838      && test x$build = x$host; then
1839         gcc_cv_as=../gas/as-new$build_exeext
1840 elif test -x as$build_exeext; then
1841         # Build using assembler in the current directory.
1842         gcc_cv_as=./as$build_exeext
1843 elif test -x $AS_FOR_TARGET; then
1844         gcc_cv_as="$AS_FOR_TARGET"
1845 else
1846         AC_PATH_PROG(gcc_cv_as, $AS_FOR_TARGET)
1847 fi])
1848
1849 ORIGINAL_AS_FOR_TARGET=$gcc_cv_as
1850 AC_SUBST(ORIGINAL_AS_FOR_TARGET)
1851
1852 AC_MSG_CHECKING(what assembler to use)
1853 if test "$gcc_cv_as" = ../gas/as-new$build_exeext; then
1854   # Single tree build which includes gas.  We want to prefer it
1855   # over whatever linker top-level may have detected, since
1856   # we'll use what we're building after installation anyway.
1857   AC_MSG_RESULT(newly built gas)
1858   in_tree_gas=yes
1859   _gcc_COMPUTE_GAS_VERSION
1860   in_tree_gas_is_elf=no
1861   if grep 'obj_format = elf' ../gas/Makefile > /dev/null \
1862      || (grep 'obj_format = multi' ../gas/Makefile \
1863          && grep 'extra_objects =.* obj-elf' ../gas/Makefile) > /dev/null
1864   then
1865     in_tree_gas_is_elf=yes
1866   fi
1867 else
1868   AC_MSG_RESULT($gcc_cv_as)
1869   in_tree_gas=no
1870 fi
1871
1872 # Identify the linker which will work hand-in-glove with the newly
1873 # built GCC, so that we can examine its features.  This is the linker
1874 # which will be driven by the driver program.
1875 #
1876 # If build != host, and we aren't building gas in-tree, we identify a
1877 # build->target linker and hope that it will have the same features
1878 # as the host->target linker we'll be using.
1879 gcc_cv_gld_major_version=
1880 gcc_cv_gld_minor_version=
1881 gcc_cv_ld_gld_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/ld
1882 gcc_cv_ld_bfd_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/bfd
1883
1884 AS_VAR_SET_IF(gcc_cv_ld,, [
1885 if test -x "$DEFAULT_LINKER"; then
1886         gcc_cv_ld="$DEFAULT_LINKER"
1887 elif test -f $gcc_cv_ld_gld_srcdir/configure.in \
1888      && test -f ../ld/Makefile \
1889      && test x$build = x$host; then
1890         gcc_cv_ld=../ld/ld-new$build_exeext
1891 elif test -x collect-ld$build_exeext; then
1892         # Build using linker in the current directory.
1893         gcc_cv_ld=./collect-ld$build_exeext
1894 elif test -x $LD_FOR_TARGET; then
1895         gcc_cv_ld="$LD_FOR_TARGET"
1896 else
1897         AC_PATH_PROG(gcc_cv_ld, $LD_FOR_TARGET)
1898 fi])
1899
1900 ORIGINAL_LD_FOR_TARGET=$gcc_cv_ld
1901 AC_SUBST(ORIGINAL_LD_FOR_TARGET)
1902
1903 AC_MSG_CHECKING(what linker to use)
1904 if test "$gcc_cv_ld" = ../ld/ld-new$build_exeext; then
1905         # Single tree build which includes ld.  We want to prefer it
1906         # over whatever linker top-level may have detected, since
1907         # we'll use what we're building after installation anyway.
1908         AC_MSG_RESULT(newly built ld)
1909         in_tree_ld=yes
1910         in_tree_ld_is_elf=no
1911         if (grep 'EMUL = .*elf' ../ld/Makefile \
1912             || grep 'EMUL = .*linux' ../ld/Makefile \
1913             || grep 'EMUL = .*lynx' ../ld/Makefile) > /dev/null; then
1914           in_tree_ld_is_elf=yes
1915         fi
1916         for f in $gcc_cv_ld_bfd_srcdir/configure $gcc_cv_ld_gld_srcdir/configure $gcc_cv_ld_gld_srcdir/configure.in $gcc_cv_ld_gld_srcdir/Makefile.in
1917         do
1918 changequote(,)dnl
1919                 gcc_cv_gld_version=`sed -n -e 's/^[     ]*\(VERSION=[0-9]*\.[0-9]*.*\)/\1/p' < $f`
1920                 if test x$gcc_cv_gld_version != x; then
1921                         break
1922                 fi
1923         done
1924         gcc_cv_gld_major_version=`expr "$gcc_cv_gld_version" : "VERSION=\([0-9]*\)"`
1925         gcc_cv_gld_minor_version=`expr "$gcc_cv_gld_version" : "VERSION=[0-9]*\.\([0-9]*\)"`
1926 changequote([,])dnl
1927 else
1928         AC_MSG_RESULT($gcc_cv_ld)
1929         in_tree_ld=no
1930 fi
1931
1932 # Figure out what nm we will be using.
1933 gcc_cv_binutils_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/binutils
1934 AS_VAR_SET_IF(gcc_cv_nm,, [
1935 if test -f $gcc_cv_binutils_srcdir/configure.in \
1936      && test -f ../binutils/Makefile \
1937      && test x$build = x$host; then
1938         gcc_cv_nm=../binutils/nm-new$build_exeext
1939 elif test -x nm$build_exeext; then
1940         gcc_cv_nm=./nm$build_exeext
1941 elif test -x $NM_FOR_TARGET; then
1942         gcc_cv_nm="$NM_FOR_TARGET"
1943 else
1944         AC_PATH_PROG(gcc_cv_nm, $NM_FOR_TARGET)
1945 fi])
1946
1947 AC_MSG_CHECKING(what nm to use)
1948 if test "$gcc_cv_nm" = ../binutils/nm-new$build_exeext; then
1949         # Single tree build which includes binutils.
1950         AC_MSG_RESULT(newly built nm)
1951         in_tree_nm=yes
1952 else
1953         AC_MSG_RESULT($gcc_cv_nm)
1954         in_tree_nm=no
1955 fi
1956
1957 ORIGINAL_NM_FOR_TARGET=$gcc_cv_nm
1958 AC_SUBST(ORIGINAL_NM_FOR_TARGET)
1959
1960 # Figure out what objdump we will be using.
1961 AS_VAR_SET_IF(gcc_cv_objdump,, [
1962 if test -f $gcc_cv_binutils_srcdir/configure.in \
1963      && test -f ../binutils/Makefile \
1964      && test x$build = x$host; then
1965         # Single tree build which includes binutils.
1966         gcc_cv_objdump=../binutils/objdump$build_exeext
1967 elif test -x objdump$build_exeext; then
1968         gcc_cv_objdump=./objdump$build_exeext
1969 elif test -x $OBJDUMP_FOR_TARGET; then
1970         gcc_cv_objdump="$OBJDUMP_FOR_TARGET"
1971 else
1972         AC_PATH_PROG(gcc_cv_objdump, $OBJDUMP_FOR_TARGET)
1973 fi])
1974
1975 AC_MSG_CHECKING(what objdump to use)
1976 if test "$gcc_cv_objdump" = ../binutils/objdump$build_exeext; then
1977         # Single tree build which includes binutils.
1978         AC_MSG_RESULT(newly built objdump)
1979 elif test x$gcc_cv_objdump = x; then
1980         AC_MSG_RESULT(not found)
1981 else
1982         AC_MSG_RESULT($gcc_cv_objdump)
1983 fi
1984
1985 # Figure out what assembler alignment features are present.
1986 gcc_GAS_CHECK_FEATURE([.balign and .p2align], gcc_cv_as_balign_and_p2align,
1987  [2,6,0],,
1988 [.balign 4
1989 .p2align 2],,
1990 [AC_DEFINE(HAVE_GAS_BALIGN_AND_P2ALIGN, 1,
1991   [Define if your assembler supports .balign and .p2align.])])
1992
1993 gcc_GAS_CHECK_FEATURE([.p2align with maximum skip], gcc_cv_as_max_skip_p2align,
1994  [2,8,0],,
1995  [.p2align 4,,7],,
1996 [AC_DEFINE(HAVE_GAS_MAX_SKIP_P2ALIGN, 1,
1997   [Define if your assembler supports specifying the maximum number
1998    of bytes to skip when using the GAS .p2align command.])])
1999
2000 gcc_GAS_CHECK_FEATURE([.literal16], gcc_cv_as_literal16,
2001  [2,8,0],,
2002  [.literal16],,
2003 [AC_DEFINE(HAVE_GAS_LITERAL16, 1,
2004   [Define if your assembler supports .literal16.])])
2005
2006 gcc_GAS_CHECK_FEATURE([working .subsection -1], gcc_cv_as_subsection_m1,
2007  [elf,2,9,0],,
2008  [conftest_label1: .word 0
2009 .subsection -1
2010 conftest_label2: .word 0
2011 .previous],
2012  [if test x$gcc_cv_nm != x; then
2013     $gcc_cv_nm conftest.o | grep conftest_label1 > conftest.nm1
2014     $gcc_cv_nm conftest.o | grep conftest_label2 | sed -e 's/label2/label1/' > conftest.nm2
2015     if cmp conftest.nm1 conftest.nm2 > /dev/null 2>&1
2016     then :
2017     else gcc_cv_as_subsection_m1=yes
2018     fi
2019     rm -f conftest.nm1 conftest.nm2
2020   fi],
2021  [AC_DEFINE(HAVE_GAS_SUBSECTION_ORDERING, 1,
2022   [Define if your assembler supports .subsection and .subsection -1 starts
2023    emitting at the beginning of your section.])])
2024
2025 gcc_GAS_CHECK_FEATURE([.weak], gcc_cv_as_weak,
2026  [2,2,0],,
2027  [      .weak foobar],,
2028 [AC_DEFINE(HAVE_GAS_WEAK, 1, [Define if your assembler supports .weak.])])
2029
2030 gcc_GAS_CHECK_FEATURE([.weakref], gcc_cv_as_weakref,
2031  [2,17,0],,
2032  [      .weakref foobar, barfnot],,
2033 [AC_DEFINE(HAVE_GAS_WEAKREF, 1, [Define if your assembler supports .weakref.])])
2034
2035 gcc_GAS_CHECK_FEATURE([.nsubspa comdat], gcc_cv_as_nsubspa_comdat,
2036  [2,15,91],,
2037  [      .SPACE $TEXT$
2038         .NSUBSPA $CODE$,COMDAT],,
2039 [AC_DEFINE(HAVE_GAS_NSUBSPA_COMDAT, 1, [Define if your assembler supports .nsubspa comdat option.])])
2040
2041 # .hidden needs to be supported in both the assembler and the linker,
2042 # because GNU LD versions before 2.12.1 have buggy support for STV_HIDDEN.
2043 # This is irritatingly difficult to feature test for; we have to check the
2044 # date string after the version number.  If we've got an in-tree
2045 # ld, we don't know its patchlevel version, so we set the baseline at 2.13
2046 # to be safe.
2047 # The gcc_GAS_CHECK_FEATURE call just sets a cache variable.
2048 gcc_GAS_CHECK_FEATURE([.hidden], gcc_cv_as_hidden,
2049  [elf,2,13,0],,
2050 [       .hidden foobar
2051 foobar:])
2052
2053 AC_CACHE_CHECK(linker for .hidden support, gcc_cv_ld_hidden,
2054 [if test $in_tree_ld = yes ; then
2055   gcc_cv_ld_hidden=no
2056   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 13 -o "$gcc_cv_gld_major_version" -gt 2 \
2057      && test $in_tree_ld_is_elf = yes; then
2058      gcc_cv_ld_hidden=yes
2059   fi
2060 else
2061   gcc_cv_ld_hidden=yes
2062   ld_ver=`$gcc_cv_ld --version 2>/dev/null | sed 1q`
2063   if echo "$ld_ver" | grep GNU > /dev/null; then
2064 changequote(,)dnl
2065     ld_vers=`echo $ld_ver | sed -n \
2066         -e 's,^.*[       ]\([0-9][0-9]*\.[0-9][0-9]*\)$,\1,p' \
2067         -e 's,^.*[       ]\([0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*\)$,\1,p' \
2068         -e 's,^.*[       ]\([0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*\)$,\1,p' \
2069         -e 's,^.*[       ]\([0-9][0-9]*\.[0-9][0-9]*\)[  ].*$,\1,p' \
2070         -e 's,^.*[       ]\([0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*\)[     ].*$,\1,p' \
2071         -e 's,^.*[       ]\([0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*\)[       ].*$,\1,p' \
2072         -e 's,^.*[       ]\([0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*\)[   -].*$,\1,p'`
2073     ld_date=`echo $ld_ver | sed -n 's,^.*\([2-9][0-9][0-9][0-9]\)[-]*\([01][0-9]\)[-]*\([0-3][0-9]\).*$,\1\2\3,p'`
2074     ld_vers_major=`expr "$ld_vers" : '\([0-9]*\)'`
2075     ld_vers_minor=`expr "$ld_vers" : '[0-9]*\.\([0-9]*\)'`
2076     ld_vers_patch=`expr "$ld_vers" : '[0-9]*\.[0-9]*\.\([0-9]*\)'`
2077     if test 0"$ld_date" -lt 20020404; then
2078       if test -n "$ld_date"; then
2079         # If there was date string, but was earlier than 2002-04-04, fail
2080         gcc_cv_ld_hidden=no
2081       elif test -z "$ld_vers"; then
2082         # If there was no date string nor ld version number, something is wrong
2083         gcc_cv_ld_hidden=no
2084       else
2085         test -z "$ld_vers_patch" && ld_vers_patch=0
2086         if test "$ld_vers_major" -lt 2; then
2087           gcc_cv_ld_hidden=no
2088         elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 12; then
2089           gcc_cv_ld_hidden="no"
2090         elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -eq 12 -a "$ld_vers_patch" -eq 0; then
2091           gcc_cv_ld_hidden=no
2092         fi
2093       fi
2094 changequote([,])dnl
2095     fi
2096   else
2097     case "${target}" in
2098       hppa64*-*-hpux* | ia64*-*-hpux*)
2099         gcc_cv_ld_hidden=yes
2100         ;;
2101       *)
2102         gcc_cv_ld_hidden=no
2103         ;;
2104     esac
2105   fi
2106 fi])
2107 libgcc_visibility=no
2108 AC_SUBST(libgcc_visibility)
2109 GCC_TARGET_TEMPLATE([HAVE_GAS_HIDDEN])
2110 if test $gcc_cv_as_hidden = yes && test $gcc_cv_ld_hidden = yes; then
2111   libgcc_visibility=yes
2112   AC_DEFINE(HAVE_GAS_HIDDEN, 1,
2113   [Define if your assembler and linker support .hidden.])
2114 fi
2115
2116 # Check if we have .[us]leb128, and support symbol arithmetic with it.
2117 gcc_GAS_CHECK_FEATURE([.sleb128 and .uleb128], gcc_cv_as_leb128,
2118   [elf,2,11,0],,
2119 [       .data
2120         .uleb128 L2 - L1
2121 L1:
2122         .uleb128 1280
2123         .sleb128 -1010
2124 L2:],
2125  [# GAS versions before 2.11 do not support uleb128,
2126   # despite appearing to.
2127   # ??? There exists an elf-specific test that will crash
2128   # the assembler.  Perhaps it's better to figure out whether
2129   # arbitrary sections are supported and try the test.
2130   as_ver=`$gcc_cv_as --version 2>/dev/null | sed 1q`
2131   if echo "$as_ver" | grep GNU > /dev/null; then
2132 changequote(,)dnl
2133     as_ver=`echo $as_ver | sed -e 's/GNU assembler \([0-9.][0-9.]*\).*/\1/'`
2134     as_major=`echo $as_ver | sed 's/\..*//'`
2135     as_minor=`echo $as_ver | sed 's/[^.]*\.\([0-9]*\).*/\1/'`
2136 changequote([,])dnl
2137     if test $as_major -eq 2 && test $as_minor -lt 11
2138     then :
2139     else gcc_cv_as_leb128=yes
2140     fi
2141   fi],
2142   [AC_DEFINE(HAVE_AS_LEB128, 1,
2143     [Define if your assembler supports .sleb128 and .uleb128.])])
2144
2145 # GAS versions up to and including 2.11.0 may mis-optimize
2146 # .eh_frame data.
2147 gcc_GAS_CHECK_FEATURE(eh_frame optimization, gcc_cv_as_eh_frame,
2148   [elf,2,12,0],,
2149 [       .text
2150 .LFB1:
2151         .4byte  0
2152 .L1:
2153         .4byte  0
2154 .LFE1:
2155         .section        .eh_frame,"aw",@progbits
2156 __FRAME_BEGIN__:
2157         .4byte  .LECIE1-.LSCIE1
2158 .LSCIE1:
2159         .4byte  0x0
2160         .byte   0x1
2161         .ascii "z\0"
2162         .byte   0x1
2163         .byte   0x78
2164         .byte   0x1a
2165         .byte   0x0
2166         .byte   0x4
2167         .4byte  1
2168         .p2align 1
2169 .LECIE1:
2170 .LSFDE1:
2171         .4byte  .LEFDE1-.LASFDE1
2172 .LASFDE1:
2173         .4byte  .LASFDE1-__FRAME_BEGIN__
2174         .4byte  .LFB1
2175         .4byte  .LFE1-.LFB1
2176         .byte   0x4
2177         .4byte  .LFE1-.LFB1
2178         .byte   0x4
2179         .4byte  .L1-.LFB1
2180 .LEFDE1:],
2181 [  dnl # For autoconf 2.5x, must protect trailing spaces with @&t@.
2182 cat > conftest.lit <<EOF
2183  0000 10000000 00000000 017a0001 781a0004  .........z..x...
2184  0010 01000000 12000000 18000000 00000000  ................
2185  0020 08000000 04080000 0044               .........D      @&t@
2186 EOF
2187 cat > conftest.big <<EOF
2188  0000 00000010 00000000 017a0001 781a0004  .........z..x...
2189  0010 00000001 00000012 00000018 00000000  ................
2190  0020 00000008 04000000 0844               .........D      @&t@
2191 EOF
2192   # If the assembler didn't choke, and we can objdump,
2193   # and we got the correct data, then succeed.
2194   # The text in the here-document typically retains its unix-style line
2195   # endings, while the output of objdump will use host line endings.
2196   # Therefore, use diff -b for the comparisons.
2197   if test x$gcc_cv_objdump != x \
2198   && $gcc_cv_objdump -s -j .eh_frame conftest.o 2>/dev/null \
2199      | tail -3 > conftest.got \
2200   && { diff -b conftest.lit conftest.got > /dev/null 2>&1 \
2201     || diff -b conftest.big conftest.got > /dev/null 2>&1; }
2202   then
2203     gcc_cv_as_eh_frame=yes
2204   elif AC_TRY_COMMAND($gcc_cv_as -o conftest.o --traditional-format /dev/null); then
2205     gcc_cv_as_eh_frame=buggy
2206   else
2207     # Uh oh, what do we do now?
2208     gcc_cv_as_eh_frame=no
2209   fi])
2210
2211 if test $gcc_cv_as_eh_frame = buggy; then
2212   AC_DEFINE(USE_AS_TRADITIONAL_FORMAT, 1,
2213   [Define if your assembler mis-optimizes .eh_frame data.])
2214 fi
2215
2216 gcc_GAS_CHECK_FEATURE(section merging support, gcc_cv_as_shf_merge,
2217  [elf,2,12,0], [--fatal-warnings],
2218  [.section .rodata.str, "aMS", @progbits, 1])
2219 if test $gcc_cv_as_shf_merge = no; then
2220   gcc_GAS_CHECK_FEATURE(section merging support, gcc_cv_as_shf_merge,
2221     [elf,2,12,0], [--fatal-warnings],
2222     [.section .rodata.str, "aMS", %progbits, 1])
2223 fi
2224 AC_DEFINE_UNQUOTED(HAVE_GAS_SHF_MERGE,
2225   [`if test $gcc_cv_as_shf_merge = yes; then echo 1; else echo 0; fi`],
2226 [Define 0/1 if your assembler supports marking sections with SHF_MERGE flag.])
2227
2228 gcc_GAS_CHECK_FEATURE(COMDAT group support, gcc_cv_as_comdat_group,
2229  [elf,2,16,0], [--fatal-warnings],
2230  [.section .text,"axG",@progbits,.foo,comdat])
2231 if test $gcc_cv_as_comdat_group = yes; then
2232   gcc_cv_as_comdat_group_percent=no
2233 else
2234  gcc_GAS_CHECK_FEATURE(COMDAT group support, gcc_cv_as_comdat_group_percent,
2235    [elf,2,16,0], [--fatal-warnings],
2236    [.section .text,"axG",%progbits,.foo,comdat])
2237 fi
2238 if test $in_tree_ld != yes && test x"$ld_vers" != x; then
2239   comdat_group=yes
2240   if test 0"$ld_date" -lt 20050308; then
2241     if test -n "$ld_date"; then
2242       # If there was date string, but was earlier than 2005-03-08, fail
2243       comdat_group=no
2244     elif test "$ld_vers_major" -lt 2; then
2245       comdat_group=no
2246     elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 16; then
2247       comdat_group=no
2248     fi
2249   fi
2250 else
2251   # assume linkers other than GNU ld don't support COMDAT group
2252   comdat_group=no
2253 fi
2254 if test $comdat_group = no; then
2255   gcc_cv_as_comdat_group=no
2256   gcc_cv_as_comdat_group_percent=no
2257 fi
2258 AC_DEFINE_UNQUOTED(HAVE_COMDAT_GROUP,
2259   [`if test $gcc_cv_as_comdat_group = yes || test $gcc_cv_as_comdat_group_percent = yes; then echo 1; else echo 0; fi`],
2260 [Define 0/1 if your assembler and linker support COMDAT groups.])
2261
2262 # Thread-local storage - the check is heavily parametrized.
2263 conftest_s=
2264 tls_first_major=
2265 tls_first_minor=
2266 tls_as_opt=
2267 case "$target" in
2268 changequote(,)dnl
2269   alpha*-*-*)
2270     conftest_s='
2271         .section ".tdata","awT",@progbits
2272 foo:    .long   25
2273         .text
2274         ldq     $27,__tls_get_addr($29)         !literal!1
2275         lda     $16,foo($29)                    !tlsgd!1
2276         jsr     $26,($27),__tls_get_addr        !lituse_tlsgd!1
2277         ldq     $27,__tls_get_addr($29)         !literal!2
2278         lda     $16,foo($29)                    !tlsldm!2
2279         jsr     $26,($27),__tls_get_addr        !lituse_tlsldm!2
2280         ldq     $1,foo($29)                     !gotdtprel
2281         ldah    $2,foo($29)                     !dtprelhi
2282         lda     $3,foo($2)                      !dtprello
2283         lda     $4,foo($29)                     !dtprel
2284         ldq     $1,foo($29)                     !gottprel
2285         ldah    $2,foo($29)                     !tprelhi
2286         lda     $3,foo($2)                      !tprello
2287         lda     $4,foo($29)                     !tprel'
2288         tls_first_major=2
2289         tls_first_minor=13
2290         tls_as_opt=--fatal-warnings
2291         ;;
2292   frv*-*-*)
2293     conftest_s='
2294         .section ".tdata","awT",@progbits
2295 x:      .long   25
2296         .text
2297         call    #gettlsoff(x)'
2298         tls_first_major=2
2299         tls_first_minor=14
2300         ;;
2301   hppa*-*-linux*)
2302     conftest_s='
2303 t1:     .reg    %r20
2304 t2:     .reg    %r21
2305 gp:     .reg    %r19
2306         .section ".tdata","awT",@progbits
2307 foo:    .long   25
2308         .text
2309         .align  4
2310         addil LT%foo-$tls_gdidx$,gp
2311         ldo RT%foo-$tls_gdidx$(%r1),%arg0
2312         b __tls_get_addr
2313         nop
2314         addil LT%foo-$tls_ldidx$,gp
2315         b __tls_get_addr
2316         ldo RT%foo-$tls_ldidx$(%r1),%arg0
2317         addil LR%foo-$tls_dtpoff$,%ret0
2318         ldo RR%foo-$tls_dtpoff$(%r1),%t1
2319         mfctl %cr27,%t1
2320         addil LT%foo-$tls_ieoff$,gp
2321         ldw RT%foo-$tls_ieoff$(%r1),%t2
2322         add %t1,%t2,%t3
2323         mfctl %cr27,%t1
2324         addil LR%foo-$tls_leoff$,%t1
2325         ldo RR%foo-$tls_leoff$(%r1),%t2'
2326         tls_first_major=2
2327         tls_first_minor=15
2328         tls_as_opt=--fatal-warnings
2329         ;;
2330   arm*-*-*)
2331     conftest_s='
2332         .section ".tdata","awT",%progbits
2333 foo:    .long   25
2334         .text
2335 .word foo(gottpoff)
2336 .word foo(tpoff)
2337 .word foo(tlsgd)
2338 .word foo(tlsldm)
2339 .word foo(tlsldo)'
2340         tls_first_major=2
2341         tls_first_minor=17
2342         ;;
2343   i[34567]86-*-*)
2344     conftest_s='
2345         .section ".tdata","awT",@progbits
2346 foo:    .long   25
2347         .text
2348         movl    %gs:0, %eax
2349         leal    foo@TLSGD(,%ebx,1), %eax
2350         leal    foo@TLSLDM(%ebx), %eax
2351         leal    foo@DTPOFF(%eax), %edx
2352         movl    foo@GOTTPOFF(%ebx), %eax
2353         subl    foo@GOTTPOFF(%ebx), %eax
2354         addl    foo@GOTNTPOFF(%ebx), %eax
2355         movl    foo@INDNTPOFF, %eax
2356         movl    $foo@TPOFF, %eax
2357         subl    $foo@TPOFF, %eax
2358         leal    foo@NTPOFF(%ecx), %eax'
2359         tls_first_major=2
2360         tls_first_minor=14
2361         tls_as_opt=--fatal-warnings
2362         ;;
2363   x86_64-*-*)
2364     conftest_s='
2365         .section ".tdata","awT",@progbits
2366 foo:    .long   25
2367         .text
2368         movq    %fs:0, %rax
2369         leaq    foo@TLSGD(%rip), %rdi
2370         leaq    foo@TLSLD(%rip), %rdi
2371         leaq    foo@DTPOFF(%rax), %rdx
2372         movq    foo@GOTTPOFF(%rip), %rax
2373         movq    $foo@TPOFF, %rax'
2374         tls_first_major=2
2375         tls_first_minor=14
2376         tls_as_opt=--fatal-warnings
2377         ;;
2378   ia64-*-*)
2379     conftest_s='
2380         .section ".tdata","awT",@progbits
2381 foo:    data8   25
2382         .text
2383         addl    r16 = @ltoff(@dtpmod(foo#)), gp
2384         addl    r17 = @ltoff(@dtprel(foo#)), gp
2385         addl    r18 = @ltoff(@tprel(foo#)), gp
2386         addl    r19 = @dtprel(foo#), gp
2387         adds    r21 = @dtprel(foo#), r13
2388         movl    r23 = @dtprel(foo#)
2389         addl    r20 = @tprel(foo#), gp
2390         adds    r22 = @tprel(foo#), r13
2391         movl    r24 = @tprel(foo#)'
2392         tls_first_major=2
2393         tls_first_minor=13
2394         tls_as_opt=--fatal-warnings
2395         ;;
2396   mips*-*-*)
2397     conftest_s='
2398         .section .tdata,"awT",@progbits
2399 x:
2400         .word 2
2401         .text
2402         addiu $4, $28, %tlsgd(x)
2403         addiu $4, $28, %tlsldm(x)
2404         lui $4, %dtprel_hi(x)
2405         addiu $4, $4, %dtprel_lo(x)
2406         lw $4, %gottprel(x)($28)
2407         lui $4, %tprel_hi(x)
2408         addiu $4, $4, %tprel_lo(x)'
2409         tls_first_major=2
2410         tls_first_minor=16
2411         tls_as_opt='-32 --fatal-warnings'
2412         ;;
2413   powerpc-*-*)
2414     conftest_s='
2415         .section ".tdata","awT",@progbits
2416         .align 2
2417 ld0:    .space 4
2418 ld1:    .space 4
2419 x1:     .space 4
2420 x2:     .space 4
2421 x3:     .space 4
2422         .text
2423         addi 3,31,ld0@got@tlsgd
2424         bl __tls_get_addr
2425         addi 3,31,x1@got@tlsld
2426         bl __tls_get_addr
2427         addi 9,3,x1@dtprel
2428         addis 9,3,x2@dtprel@ha
2429         addi 9,9,x2@dtprel@l
2430         lwz 9,x3@got@tprel(31)
2431         add 9,9,x@tls
2432         addi 9,2,x1@tprel
2433         addis 9,2,x2@tprel@ha
2434         addi 9,9,x2@tprel@l'
2435         tls_first_major=2
2436         tls_first_minor=14
2437         tls_as_opt="-a32 --fatal-warnings"
2438         ;;
2439   powerpc64-*-*)
2440     conftest_s='
2441         .section ".tdata","awT",@progbits
2442         .align 3
2443 ld0:    .space 8
2444 ld1:    .space 8
2445 x1:     .space 8
2446 x2:     .space 8
2447 x3:     .space 8
2448         .text
2449         addi 3,2,ld0@got@tlsgd
2450         bl .__tls_get_addr
2451         nop
2452         addi 3,2,ld1@toc
2453         bl .__tls_get_addr
2454         nop
2455         addi 3,2,x1@got@tlsld
2456         bl .__tls_get_addr
2457         nop
2458         addi 9,3,x1@dtprel
2459         bl .__tls_get_addr
2460         nop
2461         addis 9,3,x2@dtprel@ha
2462         addi 9,9,x2@dtprel@l
2463         bl .__tls_get_addr
2464         nop
2465         ld 9,x3@got@dtprel(2)
2466         add 9,9,3
2467         bl .__tls_get_addr
2468         nop'
2469         tls_first_major=2
2470         tls_first_minor=14
2471         tls_as_opt="-a64 --fatal-warnings"
2472         ;;
2473   s390-*-*)
2474     conftest_s='
2475         .section ".tdata","awT",@progbits
2476 foo:    .long   25
2477         .text
2478         .long   foo@TLSGD
2479         .long   foo@TLSLDM
2480         .long   foo@DTPOFF
2481         .long   foo@NTPOFF
2482         .long   foo@GOTNTPOFF
2483         .long   foo@INDNTPOFF
2484         l       %r1,foo@GOTNTPOFF(%r12)
2485         l       %r1,0(%r1):tls_load:foo
2486         bas     %r14,0(%r1,%r13):tls_gdcall:foo
2487         bas     %r14,0(%r1,%r13):tls_ldcall:foo'
2488         tls_first_major=2
2489         tls_first_minor=14
2490         tls_as_opt="-m31 --fatal-warnings"
2491         ;;
2492   s390x-*-*)
2493     conftest_s='
2494         .section ".tdata","awT",@progbits
2495 foo:    .long   25
2496         .text
2497         .quad   foo@TLSGD
2498         .quad   foo@TLSLDM
2499         .quad   foo@DTPOFF
2500         .quad   foo@NTPOFF
2501         .quad   foo@GOTNTPOFF
2502         lg      %r1,foo@GOTNTPOFF(%r12)
2503         larl    %r1,foo@INDNTPOFF
2504         brasl   %r14,__tls_get_offset@PLT:tls_gdcall:foo
2505         brasl   %r14,__tls_get_offset@PLT:tls_ldcall:foo'
2506         tls_first_major=2
2507         tls_first_minor=14
2508         tls_as_opt="-m64 -Aesame --fatal-warnings"
2509         ;;
2510   sh-*-* | sh[34]-*-*)
2511     conftest_s='
2512         .section ".tdata","awT",@progbits
2513 foo:    .long   25
2514         .text
2515         .long   foo@TLSGD
2516         .long   foo@TLSLDM
2517         .long   foo@DTPOFF
2518         .long   foo@GOTTPOFF
2519         .long   foo@TPOFF'
2520         tls_first_major=2
2521         tls_first_minor=13
2522         tls_as_opt=--fatal-warnings
2523         ;;
2524   sparc*-*-*)
2525     case "$target" in
2526       sparc*-sun-solaris2.[56789]*)
2527         # TLS was introduced in the Solaris 9 4/04 release but
2528         # we do not enable it by default on Solaris 9 either.
2529         if test "x$enable_tls" = xyes ; then
2530           on_solaris=yes
2531         else
2532           enable_tls=no;
2533         fi
2534         ;;
2535       sparc*-sun-solaris2.*)
2536         on_solaris=yes
2537         ;;
2538       *)
2539         on_solaris=no
2540         ;;
2541     esac
2542     if test x$on_solaris = xyes && test x$gas_flag = xno; then
2543       conftest_s='
2544         .section ".tdata",#alloc,#write,#tls
2545 foo:    .long   25
2546         .text
2547         sethi   %tgd_hi22(foo), %o0
2548         add     %o0, %tgd_lo10(foo), %o1
2549         add     %l7, %o1, %o0, %tgd_add(foo)
2550         call    __tls_get_addr, %tgd_call(foo)
2551         sethi   %tldm_hi22(foo), %l1
2552         add     %l1, %tldm_lo10(foo), %l2
2553         add     %l7, %l2, %o0, %tldm_add(foo)
2554         call    __tls_get_addr, %tldm_call(foo)
2555         sethi   %tldo_hix22(foo), %l3
2556         xor     %l3, %tldo_lox10(foo), %l4
2557         add     %o0, %l4, %l5, %tldo_add(foo)
2558         sethi   %tie_hi22(foo), %o3
2559         add     %o3, %tie_lo10(foo), %o3
2560         ld      [%l7 + %o3], %o2, %tie_ld(foo)
2561         add     %g7, %o2, %o4, %tie_add(foo)
2562         sethi   %tle_hix22(foo), %l1
2563         xor     %l1, %tle_lox10(foo), %o5
2564         ld      [%g7 + %o5], %o1'
2565         tls_first_major=0
2566         tls_first_minor=0
2567     else
2568       conftest_s='
2569         .section ".tdata","awT",@progbits
2570 foo:    .long   25
2571         .text
2572         sethi   %tgd_hi22(foo), %o0
2573         add     %o0, %tgd_lo10(foo), %o1
2574         add     %l7, %o1, %o0, %tgd_add(foo)
2575         call    __tls_get_addr, %tgd_call(foo)
2576         sethi   %tldm_hi22(foo), %l1
2577         add     %l1, %tldm_lo10(foo), %l2
2578         add     %l7, %l2, %o0, %tldm_add(foo)
2579         call    __tls_get_addr, %tldm_call(foo)
2580         sethi   %tldo_hix22(foo), %l3
2581         xor     %l3, %tldo_lox10(foo), %l4
2582         add     %o0, %l4, %l5, %tldo_add(foo)
2583         sethi   %tie_hi22(foo), %o3
2584         add     %o3, %tie_lo10(foo), %o3
2585         ld      [%l7 + %o3], %o2, %tie_ld(foo)
2586         add     %g7, %o2, %o4, %tie_add(foo)
2587         sethi   %tle_hix22(foo), %l1
2588         xor     %l1, %tle_lox10(foo), %o5
2589         ld      [%g7 + %o5], %o1'
2590         tls_first_major=2
2591         tls_first_minor=14
2592         tls_as_opt="-32 --fatal-warnings"
2593       fi
2594         ;;
2595 changequote([,])dnl
2596 esac
2597 set_have_as_tls=no
2598 if test "x$enable_tls" = xno ; then
2599   : # TLS explicitly disabled.
2600 elif test "x$enable_tls" = xyes ; then
2601   set_have_as_tls=yes # TLS explicitly enabled.
2602 elif test -z "$tls_first_major"; then
2603   : # If we don't have a check, assume no support.
2604 else
2605   gcc_GAS_CHECK_FEATURE(thread-local storage support, gcc_cv_as_tls,
2606   [$tls_first_major,$tls_first_minor,0], [$tls_as_opt], [$conftest_s],,
2607   [set_have_as_tls=yes])
2608 fi
2609 if test $set_have_as_tls = yes ; then
2610   AC_DEFINE(HAVE_AS_TLS, 1,
2611             [Define if your assembler supports thread-local storage.])
2612 fi
2613
2614 # Target-specific assembler checks.
2615
2616 AC_MSG_CHECKING(linker -Bstatic/-Bdynamic option)
2617 gcc_cv_ld_static_dynamic=no
2618 if test $in_tree_ld = yes ; then
2619   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 10; then
2620     gcc_cv_ld_static_dynamic=yes
2621   fi
2622 elif test x$gcc_cv_ld != x; then
2623         # Check if linker supports -Bstatic/-Bdynamic option
2624         if $gcc_cv_ld --help 2>/dev/null | grep -- -Bstatic > /dev/null \
2625           && $gcc_cv_ld --help 2>/dev/null | grep -- -Bdynamic > /dev/null; then
2626                 gcc_cv_ld_static_dynamic=yes
2627         fi
2628 fi
2629 if test x"$gcc_cv_ld_static_dynamic" = xyes; then
2630         AC_DEFINE(HAVE_LD_STATIC_DYNAMIC, 1,
2631 [Define if your linker supports -Bstatic/-Bdynamic option.])
2632 fi
2633 AC_MSG_RESULT($gcc_cv_ld_static_dynamic)
2634
2635 if test x"$demangler_in_ld" = xyes; then
2636   AC_MSG_CHECKING(linker --demangle support)
2637   gcc_cv_ld_demangle=no
2638   if test $in_tree_ld = yes; then
2639     if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 14 -o "$gcc_cv_gld_major_version" -gt 2; then \
2640       gcc_cv_ld_demangle=yes
2641     fi
2642   elif test x$gcc_cv_ld != x -a x"$gnu_ld" = xyes; then
2643     # Check if the GNU linker supports --demangle option
2644     if $gcc_cv_ld --help 2>/dev/null | grep no-demangle > /dev/null; then
2645       gcc_cv_ld_demangle=yes
2646     fi
2647   fi
2648   if test x"$gcc_cv_ld_demangle" = xyes; then
2649     AC_DEFINE(HAVE_LD_DEMANGLE, 1,
2650 [Define if your linker supports --demangle option.])
2651   fi
2652   AC_MSG_RESULT($gcc_cv_ld_demangle)
2653 fi
2654
2655 case "$target" in
2656   # All TARGET_ABI_OSF targets.
2657   alpha*-*-osf* | alpha*-*-linux* | alpha*-*-*bsd*)
2658     gcc_GAS_CHECK_FEATURE([explicit relocation support],
2659         gcc_cv_as_alpha_explicit_relocs, [2,12,0],,
2660 [       .set nomacro
2661         .text
2662         extbl   $3, $2, $3      !lituse_bytoff!1
2663         ldq     $2, a($29)      !literal!1
2664         ldq     $4, b($29)      !literal!2
2665         ldq_u   $3, 0($2)       !lituse_base!1
2666         ldq     $27, f($29)     !literal!5
2667         jsr     $26, ($27), f   !lituse_jsr!5
2668         ldah    $29, 0($26)     !gpdisp!3
2669         lda     $0, c($29)      !gprel
2670         ldah    $1, d($29)      !gprelhigh
2671         lda     $1, d($1)       !gprellow
2672         lda     $29, 0($29)     !gpdisp!3],,
2673     [AC_DEFINE(HAVE_AS_EXPLICIT_RELOCS, 1,
2674   [Define if your assembler supports explicit relocations.])])
2675     gcc_GAS_CHECK_FEATURE([jsrdirect relocation support],
2676         gcc_cv_as_alpha_jsrdirect_relocs, [2,16,90],,
2677 [       .set nomacro
2678         .text
2679         ldq     $27, a($29)     !literal!1
2680         jsr     $26, ($27), a   !lituse_jsrdirect!1],,
2681     [AC_DEFINE(HAVE_AS_JSRDIRECT_RELOCS, 1,
2682   [Define if your assembler supports the lituse_jsrdirect relocation.])])
2683     ;;
2684
2685   cris-*-*)
2686     gcc_GAS_CHECK_FEATURE([-no-mul-bug-abort option],
2687       gcc_cv_as_cris_no_mul_bug,[2,15,91],
2688       [-no-mul-bug-abort], [.text],,
2689       [AC_DEFINE(HAVE_AS_NO_MUL_BUG_ABORT_OPTION, 1,
2690                 [Define if your assembler supports the -no-mul-bug-abort option.])])
2691     ;;
2692
2693   sparc*-*-*)
2694     gcc_GAS_CHECK_FEATURE([.register], gcc_cv_as_sparc_register_op,,,
2695       [.register %g2, #scratch],,
2696       [AC_DEFINE(HAVE_AS_REGISTER_PSEUDO_OP, 1,
2697                 [Define if your assembler supports .register.])])
2698
2699     gcc_GAS_CHECK_FEATURE([-relax option], gcc_cv_as_sparc_relax,,
2700       [-relax], [.text],,
2701       [AC_DEFINE(HAVE_AS_RELAX_OPTION, 1,
2702                 [Define if your assembler supports -relax option.])])
2703
2704     gcc_GAS_CHECK_FEATURE([unaligned pcrel relocs],
2705       gcc_cv_as_sparc_ua_pcrel,,
2706       [-K PIC],
2707 [.text
2708 foo:
2709         nop
2710 .data
2711 .align 4
2712 .byte 0
2713 .uaword %r_disp32(foo)],
2714       [if test x$gcc_cv_ld != x \
2715        && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1; then
2716          gcc_cv_as_sparc_ua_pcrel=yes
2717        fi
2718        rm -f conftest],
2719       [AC_DEFINE(HAVE_AS_SPARC_UA_PCREL, 1,
2720                 [Define if your assembler and linker support unaligned PC relative relocs.])
2721
2722       gcc_GAS_CHECK_FEATURE([unaligned pcrel relocs against hidden symbols],
2723         gcc_cv_as_sparc_ua_pcrel_hidden,,
2724         [-K PIC],
2725 [.data
2726 .align 4
2727 .byte 0x31
2728 .uaword %r_disp32(foo)
2729 .byte 0x32, 0x33, 0x34
2730 .global foo
2731 .hidden foo
2732 foo:
2733 .skip 4],
2734         [if test x$gcc_cv_ld != x && test x$gcc_cv_objdump != x \
2735          && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1 \
2736          && $gcc_cv_objdump -s -j .data conftest 2> /dev/null \
2737             | grep ' 31000000 07323334' > /dev/null 2>&1; then
2738             if $gcc_cv_objdump -R conftest 2> /dev/null \
2739                | grep 'DISP32' > /dev/null 2>&1; then
2740                 :
2741             else
2742                 gcc_cv_as_sparc_ua_pcrel_hidden=yes
2743             fi
2744          fi
2745          rm -f conftest],
2746          [AC_DEFINE(HAVE_AS_SPARC_UA_PCREL_HIDDEN, 1,
2747                    [Define if your assembler and linker support unaligned PC relative relocs against hidden symbols.])])
2748     ]) # unaligned pcrel relocs
2749
2750     gcc_GAS_CHECK_FEATURE([offsetable %lo()],
2751       gcc_cv_as_sparc_offsetable_lo10,,
2752       [-xarch=v9],
2753 [.text
2754         or %g1, %lo(ab) + 12, %g1
2755         or %g1, %lo(ab + 12), %g1],
2756       [if test x$gcc_cv_objdump != x \
2757        && $gcc_cv_objdump -s -j .text conftest.o 2> /dev/null \
2758           | grep ' 82106000 82106000' > /dev/null 2>&1; then
2759          gcc_cv_as_sparc_offsetable_lo10=yes
2760        fi],
2761        [AC_DEFINE(HAVE_AS_OFFSETABLE_LO10, 1,
2762                  [Define if your assembler supports offsetable %lo().])])
2763     ;;
2764
2765 changequote(,)dnl
2766   i[34567]86-*-* | x86_64-*-*)
2767 changequote([,])dnl
2768     case $target_os in
2769       cygwin* | pe | mingw32*)
2770         # Used for DWARF 2 in PE
2771         gcc_GAS_CHECK_FEATURE([.secrel32 relocs],
2772           gcc_cv_as_ix86_pe_secrel32,
2773           [2,15,91],,
2774 [.text
2775 foo:    nop
2776 .data
2777         .secrel32 foo],
2778           [if test x$gcc_cv_ld != x \
2779            && $gcc_cv_ld -o conftest conftest.o > /dev/null 2>&1; then
2780              gcc_cv_as_ix86_pe_secrel32=yes
2781            fi
2782            rm -f conftest],
2783           [AC_DEFINE(HAVE_GAS_PE_SECREL32_RELOC, 1,
2784             [Define if your assembler and linker support 32-bit section relative relocs via '.secrel32 label'.])])
2785         ;;
2786     esac
2787
2788     gcc_GAS_CHECK_FEATURE([filds and fists mnemonics],
2789        gcc_cv_as_ix86_filds_fists,
2790       [2,9,0],, [filds mem; fists mem],,
2791       [AC_DEFINE(HAVE_GAS_FILDS_FISTS, 1,
2792         [Define if your assembler uses the new HImode fild and fist notation.])])
2793
2794     gcc_GAS_CHECK_FEATURE([cmov syntax],
2795       gcc_cv_as_ix86_cmov_sun_syntax,,,
2796       [cmovl.l %edx, %eax],,
2797       [AC_DEFINE(HAVE_AS_IX86_CMOV_SUN_SYNTAX, 1,
2798         [Define if your assembler supports the Sun syntax for cmov.])])
2799
2800     gcc_GAS_CHECK_FEATURE([ffreep mnemonic],
2801       gcc_cv_as_ix86_ffreep,,,
2802       [ffreep %st(1)],,
2803       [AC_DEFINE(HAVE_AS_IX86_FFREEP, 1,
2804         [Define if your assembler supports the ffreep mnemonic.])])
2805
2806     gcc_GAS_CHECK_FEATURE([different section symbol subtraction],
2807       gcc_cv_as_ix86_diff_sect_delta,,,
2808       [.section .rodata
2809 .L1:
2810         .long .L2-.L1
2811         .long .L3-.L1
2812         .text
2813 .L3:    nop
2814 .L2:    nop],,
2815       [AC_DEFINE(HAVE_AS_IX86_DIFF_SECT_DELTA, 1,
2816         [Define if your assembler supports the subtraction of symbols in different sections.])])
2817
2818     # This one is used unconditionally by i386.[ch]; it is to be defined
2819     # to 1 if the feature is present, 0 otherwise.
2820     gcc_GAS_CHECK_FEATURE([GOTOFF in data],
2821         gcc_cv_as_ix86_gotoff_in_data, [2,11,0],,
2822 [       .text
2823 .L0:
2824         nop
2825         .data
2826         .long .L0@GOTOFF])
2827     AC_DEFINE_UNQUOTED(HAVE_AS_GOTOFF_IN_DATA,
2828       [`if test $gcc_cv_as_ix86_gotoff_in_data = yes; then echo 1; else echo 0; fi`],
2829       [Define true if the assembler supports '.long foo@GOTOFF'.])
2830     ;;
2831
2832   ia64*-*-*)
2833     gcc_GAS_CHECK_FEATURE([ltoffx and ldxmov relocs],
2834         gcc_cv_as_ia64_ltoffx_ldxmov_relocs, [2,14,0],,
2835 [       .text
2836         addl r15 = @ltoffx(x#), gp
2837         ;;
2838         ld8.mov r16 = [[r15]], x#],,
2839     [AC_DEFINE(HAVE_AS_LTOFFX_LDXMOV_RELOCS, 1,
2840           [Define if your assembler supports ltoffx and ldxmov relocations.])])
2841
2842     ;;
2843
2844   powerpc*-*-*)
2845     case $target in
2846       *-*-aix*) conftest_s='    .machine "pwr5"
2847         .csect .text[[PR]]
2848         mfcr 3,128';;
2849       *-*-darwin*)
2850         gcc_GAS_CHECK_FEATURE([.machine directive support],
2851           gcc_cv_as_machine_directive,,,
2852           [     .machine ppc7400])
2853         if test x$gcc_cv_as_machine_directive != xyes; then
2854           echo "*** This target requires an assembler supporting \".machine\"" >&2
2855           echo you can get it from: ftp://gcc.gnu.org/pub/gcc/infrastructure/cctools-528.5.dmg >&2
2856           test x$build = x$target && exit 1
2857         fi
2858         conftest_s='    .text
2859         mfcr r3,128';;
2860       *) conftest_s='   .machine power4
2861         .text
2862         mfcr 3,128';;
2863     esac
2864
2865     gcc_GAS_CHECK_FEATURE([mfcr field support],
2866       gcc_cv_as_powerpc_mfcrf, [2,14,0],,
2867       [$conftest_s],,
2868       [AC_DEFINE(HAVE_AS_MFCRF, 1,
2869           [Define if your assembler supports mfcr field.])])
2870
2871     case $target in
2872       *-*-aix*) conftest_s='    .machine "pwr5"
2873         .csect .text[[PR]]
2874         popcntb 3,3';;
2875       *) conftest_s='   .machine power5
2876         .text
2877         popcntb 3,3';;
2878     esac
2879
2880     gcc_GAS_CHECK_FEATURE([popcntb support],
2881       gcc_cv_as_powerpc_popcntb, [2,17,0],,
2882       [$conftest_s],,
2883       [AC_DEFINE(HAVE_AS_POPCNTB, 1,
2884           [Define if your assembler supports popcntb field.])])
2885
2886     case $target in
2887       *-*-aix*) conftest_s='    .machine "pwr5x"
2888         .csect .text[[PR]]
2889         frin 1,1';;
2890       *) conftest_s='   .machine power5
2891         .text
2892         frin 1,1';;
2893     esac
2894
2895     gcc_GAS_CHECK_FEATURE([fp round support],
2896       gcc_cv_as_powerpc_fprnd, [2,17,0],,
2897       [$conftest_s],,
2898       [AC_DEFINE(HAVE_AS_FPRND, 1,
2899           [Define if your assembler supports fprnd.])])
2900
2901     case $target in
2902       *-*-aix*) conftest_s='    .machine "pwr6"
2903         .csect .text[[PR]]
2904         mffgpr 1,3';;
2905       *) conftest_s='   .machine power6
2906         .text
2907         mffgpr 1,3';;
2908     esac
2909
2910     gcc_GAS_CHECK_FEATURE([move fp gpr support],
2911       gcc_cv_as_powerpc_mfpgpr, [9,99,0],,
2912       [$conftest_s],,
2913       [AC_DEFINE(HAVE_AS_MFPGPR, 1,
2914           [Define if your assembler supports mffgpr and mftgpr.])])
2915
2916     case $target in
2917       *-*-aix*) conftest_s='    .csect .text[[PR]]
2918 LCF..0:
2919         addis 11,30,_GLOBAL_OFFSET_TABLE_-LCF..0@ha';;
2920       *-*-darwin*)
2921         conftest_s='    .text
2922 LCF0:
2923         addis r11,r30,_GLOBAL_OFFSET_TABLE_-LCF0@ha';;
2924       *) conftest_s='   .text
2925 .LCF0:
2926         addis 11,30,_GLOBAL_OFFSET_TABLE_-.LCF0@ha';;
2927     esac
2928
2929     gcc_GAS_CHECK_FEATURE([rel16 relocs],
2930       gcc_cv_as_powerpc_rel16, [2,17,0], -a32,
2931       [$conftest_s],,
2932       [AC_DEFINE(HAVE_AS_REL16, 1,
2933           [Define if your assembler supports R_PPC_REL16 relocs.])])
2934
2935     case $target in
2936       *-*-aix*) conftest_s='    .machine "pwr6"
2937         .csect .text[[PR]]
2938         cmpb 3,4,5';;
2939       *) conftest_s='   .machine power6
2940         .text
2941         cmpb 3,4,5';;
2942     esac
2943
2944     gcc_GAS_CHECK_FEATURE([compare bytes support],
2945       gcc_cv_as_powerpc_cmpb, [9,99,0], -a32,
2946       [$conftest_s],,
2947       [AC_DEFINE(HAVE_AS_CMPB, 1,
2948           [Define if your assembler supports cmpb.])])
2949
2950     case $target in
2951       *-*-aix*) conftest_s='    .machine "pwr6"
2952         .csect .text[[PR]]
2953         dadd 1,3';;
2954       *) conftest_s='   .machine power6
2955         .text
2956         dadd 1,3';;
2957     esac
2958
2959     gcc_GAS_CHECK_FEATURE([decimal float support],
2960       gcc_cv_as_powerpc_dfp, [9,99,0], -a32,
2961       [$conftest_s],,
2962       [AC_DEFINE(HAVE_AS_DFP, 1,
2963           [Define if your assembler supports DFP instructions.])])
2964     ;;
2965
2966   mips*-*-*)
2967     gcc_GAS_CHECK_FEATURE([explicit relocation support],
2968       gcc_cv_as_mips_explicit_relocs, [2,14,0],,
2969 [       lw $4,%gp_rel(foo)($4)],,
2970       [if test x$target_cpu_default = x
2971        then target_cpu_default=MASK_EXPLICIT_RELOCS
2972        else target_cpu_default="($target_cpu_default)|MASK_EXPLICIT_RELOCS"
2973        fi])
2974     gcc_GAS_CHECK_FEATURE([-mno-shared support],
2975       gcc_cv_as_mips_no_shared, [2,16,0], [-mno-shared], [nop],,
2976       [AC_DEFINE(HAVE_AS_NO_SHARED, 1,
2977                  [Define if the assembler understands -mno-shared.])])
2978     ;;
2979 esac
2980
2981 # Mips and HP-UX need the GNU assembler.
2982 # Linux on IA64 might be able to use the Intel assembler.
2983
2984 case "$target" in
2985   mips*-*-* | *-*-hpux* )
2986     if test x$gas_flag = xyes \
2987        || test x"$host" != x"$build" \
2988        || test ! -x "$gcc_cv_as" \
2989        || "$gcc_cv_as" -v < /dev/null 2>&1 | grep GNU > /dev/null; then
2990       :
2991     else
2992       echo "*** This configuration requires the GNU assembler" >&2
2993       exit 1
2994     fi
2995     ;;
2996 esac
2997
2998 # ??? Not all targets support dwarf2 debug_line, even within a version
2999 # of gas.  Moreover, we need to emit a valid instruction to trigger any
3000 # info to the output file.  So, as supported targets are added to gas 2.11,
3001 # add some instruction here to (also) show we expect this might work.
3002 # ??? Once 2.11 is released, probably need to add first known working
3003 # version to the per-target configury.
3004 case "$target" in
3005   i?86*-*-* | mips*-*-* | alpha*-*-* | powerpc*-*-* | sparc*-*-* | m68*-*-* \
3006   | x86_64*-*-* | hppa*-*-* | arm*-*-* | strongarm*-*-* | xscale*-*-* \
3007   | xstormy16*-*-* | cris-*-* | xtensa-*-* | bfin-*-* | score*-*-* | spu-*-*)
3008     insn="nop"
3009     ;;
3010   ia64*-*-* | s390*-*-*)
3011     insn="nop 0"
3012     ;;
3013   mmix-*-*)
3014     insn="swym 0"
3015     ;;
3016 esac
3017 if test x"$insn" != x; then
3018  conftest_s="\
3019         .file 1 \"conftest.s\"
3020         .loc 1 3 0
3021         $insn"
3022  gcc_GAS_CHECK_FEATURE([dwarf2 debug_line support],
3023   gcc_cv_as_dwarf2_debug_line,
3024   [elf,2,11,0],, [$conftest_s],
3025   [if test x$gcc_cv_objdump != x \
3026    && $gcc_cv_objdump -h conftest.o 2> /dev/null \
3027       | grep debug_line > /dev/null 2>&1; then
3028      gcc_cv_as_dwarf2_debug_line=yes
3029    fi])
3030
3031 # The .debug_line file table must be in the exact order that
3032 # we specified the files, since these indices are also used
3033 # by DW_AT_decl_file.  Approximate this test by testing if
3034 # the assembler bitches if the same index is assigned twice.
3035  gcc_GAS_CHECK_FEATURE([buggy dwarf2 .file directive],
3036   gcc_cv_as_dwarf2_file_buggy,,,
3037 [       .file 1 "foo.s"
3038         .file 1 "bar.s"])
3039
3040  if test $gcc_cv_as_dwarf2_debug_line = yes \
3041  && test $gcc_cv_as_dwarf2_file_buggy = no; then
3042         AC_DEFINE(HAVE_AS_DWARF2_DEBUG_LINE, 1,
3043   [Define if your assembler supports dwarf2 .file/.loc directives,
3044    and preserves file table indices exactly as given.])
3045  fi
3046
3047  gcc_GAS_CHECK_FEATURE([--gdwarf2 option],
3048   gcc_cv_as_gdwarf2_flag,
3049   [elf,2,11,0], [--gdwarf2], [$insn],,
3050   [AC_DEFINE(HAVE_AS_GDWARF2_DEBUG_FLAG, 1,
3051 [Define if your assembler supports the --gdwarf2 option.])])
3052
3053  gcc_GAS_CHECK_FEATURE([--gstabs option],
3054   gcc_cv_as_gstabs_flag,
3055   [elf,2,11,0], [--gstabs], [$insn],
3056   [# The native Solaris 9/Intel assembler doesn't understand --gstabs
3057    # and warns about it, but still exits successfully.  So check for
3058    # this.
3059    if AC_TRY_COMMAND([$gcc_cv_as --gstabs -o conftest.o conftest.s 2>&1 | grep -i warning > /dev/null])
3060    then :
3061    else gcc_cv_as_gstabs_flag=yes
3062    fi],
3063   [AC_DEFINE(HAVE_AS_GSTABS_DEBUG_FLAG, 1,
3064 [Define if your assembler supports the --gstabs option.])])
3065 fi
3066
3067 AC_MSG_CHECKING(linker read-only and read-write section mixing)
3068 gcc_cv_ld_ro_rw_mix=unknown
3069 if test $in_tree_ld = yes ; then
3070   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 10 -o "$gcc_cv_gld_major_version" -gt 2 \
3071      && test $in_tree_ld_is_elf = yes; then
3072     gcc_cv_ld_ro_rw_mix=read-write
3073   fi
3074 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x ; then
3075   echo '.section myfoosect, "a"' > conftest1.s
3076   echo '.section myfoosect, "aw"' > conftest2.s
3077   echo '.byte 1' >> conftest2.s
3078   echo '.section myfoosect, "a"' > conftest3.s
3079   echo '.byte 0' >> conftest3.s
3080   if $gcc_cv_as -o conftest1.o conftest1.s > /dev/null 2>&1 \
3081      && $gcc_cv_as -o conftest2.o conftest2.s > /dev/null 2>&1 \
3082      && $gcc_cv_as -o conftest3.o conftest3.s > /dev/null 2>&1 \
3083      && $gcc_cv_ld -shared -o conftest1.so conftest1.o \
3084         conftest2.o conftest3.o > /dev/null 2>&1; then
3085     gcc_cv_ld_ro_rw_mix=`$gcc_cv_objdump -h conftest1.so \
3086                          | sed -e '/myfoosect/!d' -e N`
3087     if echo "$gcc_cv_ld_ro_rw_mix" | grep CONTENTS > /dev/null; then
3088       if echo "$gcc_cv_ld_ro_rw_mix" | grep READONLY > /dev/null; then
3089         gcc_cv_ld_ro_rw_mix=read-only
3090       else
3091         gcc_cv_ld_ro_rw_mix=read-write
3092       fi
3093     fi
3094   fi
3095 changequote(,)dnl
3096   rm -f conftest.* conftest[123].*
3097 changequote([,])dnl
3098 fi
3099 if test x$gcc_cv_ld_ro_rw_mix = xread-write; then
3100         AC_DEFINE(HAVE_LD_RO_RW_SECTION_MIXING, 1,
3101   [Define if your linker links a mix of read-only
3102    and read-write sections into a read-write section.])
3103 fi
3104 AC_MSG_RESULT($gcc_cv_ld_ro_rw_mix)
3105
3106 AC_MSG_CHECKING(linker PT_GNU_EH_FRAME support)
3107 gcc_cv_ld_eh_frame_hdr=no
3108 if test $in_tree_ld = yes ; then
3109   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 12 -o "$gcc_cv_gld_major_version" -gt 2 \
3110      && test $in_tree_ld_is_elf = yes; then
3111     gcc_cv_ld_eh_frame_hdr=yes
3112   fi
3113 elif test x$gcc_cv_ld != x; then
3114         # Check if linker supports --eh-frame-hdr option
3115         if $gcc_cv_ld --help 2>/dev/null | grep eh-frame-hdr > /dev/null; then
3116                 gcc_cv_ld_eh_frame_hdr=yes
3117         fi
3118 fi
3119 GCC_TARGET_TEMPLATE([HAVE_LD_EH_FRAME_HDR])
3120 if test x"$gcc_cv_ld_eh_frame_hdr" = xyes; then
3121         AC_DEFINE(HAVE_LD_EH_FRAME_HDR, 1,
3122 [Define if your linker supports --eh-frame-hdr option.])
3123 fi
3124 AC_MSG_RESULT($gcc_cv_ld_eh_frame_hdr)
3125
3126 AC_MSG_CHECKING(linker position independent executable support)
3127 gcc_cv_ld_pie=no
3128 if test $in_tree_ld = yes ; then
3129   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 15 -o "$gcc_cv_gld_major_version" -gt 2 \
3130      && test $in_tree_ld_is_elf = yes; then
3131     gcc_cv_ld_pie=yes
3132   fi
3133 elif test x$gcc_cv_ld != x; then
3134         # Check if linker supports -pie option
3135         if $gcc_cv_ld --help 2>/dev/null | grep -- -pie > /dev/null; then
3136                 gcc_cv_ld_pie=yes
3137         fi
3138 fi
3139 if test x"$gcc_cv_ld_pie" = xyes; then
3140         AC_DEFINE(HAVE_LD_PIE, 1,
3141 [Define if your linker supports -pie option.])
3142 fi
3143 AC_MSG_RESULT($gcc_cv_ld_pie)
3144
3145 AC_MSG_CHECKING(linker EH-compatible garbage collection of sections)
3146 gcc_cv_ld_eh_gc_sections=no
3147 if test $in_tree_ld = yes ; then
3148   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 17 -o "$gcc_cv_gld_major_version" -gt 2 \
3149      && test $in_tree_ld_is_elf = yes; then
3150     gcc_cv_ld_eh_gc_sections=yes
3151   fi
3152 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x ; then
3153   cat > conftest.s <<EOF
3154         .section        .text
3155 .globl _start
3156         .type _start, @function
3157 _start:
3158         .long foo
3159         .size _start, .-_start
3160         .section        .text.foo,"ax",@progbits
3161         .type foo, @function
3162 foo:
3163         .long 0
3164         .size foo, .-foo
3165         .section        .gcc_except_table.foo,"a",@progbits
3166 .L0:
3167         .long 0
3168         .section        .eh_frame,"a",@progbits
3169         .long .L0
3170 EOF
3171   if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
3172     if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
3173          | grep "gc-sections option ignored" > /dev/null; then
3174       gcc_cv_ld_eh_gc_sections=no
3175     elif $gcc_cv_objdump -h conftest | grep gcc_except_table > /dev/null; then
3176       gcc_cv_ld_eh_gc_sections=yes
3177       # If no COMDAT groups, the compiler will emit .gnu.linkonce.t. sections.
3178       if test x$gcc_cv_as_comdat_group != xyes; then
3179         gcc_cv_ld_eh_gc_sections=no
3180         cat > conftest.s <<EOF
3181         .section        .text
3182 .globl _start
3183         .type _start, @function
3184 _start:
3185         .long foo
3186         .size _start, .-_start
3187         .section        .gnu.linkonce.t.foo,"ax",@progbits
3188         .type foo, @function
3189 foo:
3190         .long 0
3191         .size foo, .-foo
3192         .section        .gcc_except_table.foo,"a",@progbits
3193 .L0:
3194         .long 0
3195         .section        .eh_frame,"a",@progbits
3196         .long .L0
3197 EOF
3198         if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
3199           if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
3200                | grep "gc-sections option ignored" > /dev/null; then
3201             gcc_cv_ld_eh_gc_sections=no
3202           elif $gcc_cv_objdump -h conftest | grep gcc_except_table > /dev/null; then
3203             gcc_cv_ld_eh_gc_sections=yes
3204           fi
3205         fi
3206       fi
3207     fi
3208   fi
3209   rm -f conftest.s conftest.o conftest
3210 fi
3211 case "$target" in
3212   hppa*-*-linux*)
3213     # ??? This apparently exposes a binutils bug with PC-relative relocations.
3214     gcc_cv_ld_eh_gc_sections=no
3215     ;;
3216 esac
3217 if test x$gcc_cv_ld_eh_gc_sections = xyes; then
3218         AC_DEFINE(HAVE_LD_EH_GC_SECTIONS, 1,
3219   [Define if your linker supports garbage collection of
3220    sections in presence of EH frames.])
3221 fi
3222 AC_MSG_RESULT($gcc_cv_ld_eh_gc_sections)
3223
3224 # --------
3225 # UNSORTED
3226 # --------
3227
3228 AC_CACHE_CHECK(linker --as-needed support,
3229 gcc_cv_ld_as_needed,
3230 [gcc_cv_ld_as_needed=no
3231 if test $in_tree_ld = yes ; then
3232   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 \
3233      && test $in_tree_ld_is_elf = yes; then
3234     gcc_cv_ld_as_needed=yes
3235   fi
3236 elif test x$gcc_cv_ld != x; then
3237         # Check if linker supports --as-needed and --no-as-needed options
3238         if $gcc_cv_ld --help 2>/dev/null | grep as-needed > /dev/null; then
3239                 gcc_cv_ld_as_needed=yes
3240         fi
3241 fi
3242 ])
3243 if test x"$gcc_cv_ld_as_needed" = xyes; then
3244         AC_DEFINE(HAVE_LD_AS_NEEDED, 1,
3245 [Define if your linker supports --as-needed and --no-as-needed options.])
3246 fi
3247
3248 case "$target:$tm_file" in
3249   powerpc64*-*-linux* | powerpc*-*-linux*rs6000/biarch64.h*)
3250     AC_CACHE_CHECK(linker support for omitting dot symbols,
3251     gcc_cv_ld_no_dot_syms,
3252     [gcc_cv_ld_no_dot_syms=no
3253     if test $in_tree_ld = yes ; then
3254       if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2; then
3255         gcc_cv_ld_no_dot_syms=yes
3256       fi
3257     elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x ; then
3258       cat > conftest1.s <<EOF
3259         .text
3260         bl .foo
3261 EOF
3262       cat > conftest2.s <<EOF
3263         .section ".opd","aw"
3264         .align 3
3265         .globl foo
3266         .type foo,@function
3267 foo:
3268         .quad .LEfoo,.TOC.@tocbase,0
3269         .text
3270 .LEfoo:
3271         blr
3272         .size foo,.-.LEfoo
3273 EOF
3274       if $gcc_cv_as -a64 -o conftest1.o conftest1.s > /dev/null 2>&1 \
3275          && $gcc_cv_as -a64 -o conftest2.o conftest2.s > /dev/null 2>&1 \
3276          && $gcc_cv_ld -melf64ppc -o conftest conftest1.o conftest2.o > /dev/null 2>&1; then
3277         gcc_cv_ld_no_dot_syms=yes
3278       fi
3279       rm -f conftest conftest1.o conftest2.o conftest1.s conftest2.s
3280     fi
3281     ])
3282     if test x"$gcc_cv_ld_no_dot_syms" = xyes; then
3283       AC_DEFINE(HAVE_LD_NO_DOT_SYMS, 1,
3284     [Define if your PowerPC64 linker only needs function descriptor syms.])
3285     fi
3286     ;;
3287 esac
3288
3289 AC_CACHE_CHECK(linker --sysroot support,
3290   gcc_cv_ld_sysroot,
3291   [gcc_cv_ld_sysroot=no
3292   if test $in_tree_ld = yes ; then
3293       if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 ; then
3294         gcc_cv_ld_sysroot=yes
3295       fi
3296   elif test x$gcc_cv_ld != x; then
3297     if $gcc_cv_ld --help 2>/dev/null | grep sysroot > /dev/null; then
3298       gcc_cv_ld_sysroot=yes
3299     fi
3300   fi])
3301 if test x"$gcc_cv_ld_sysroot" = xyes; then
3302   AC_DEFINE(HAVE_LD_SYSROOT, 1,
3303   [Define if your linker supports --sysroot.])
3304 fi
3305
3306 if test x$with_sysroot = x && test x$host = x$target \
3307    && test "$prefix" != "/usr" && test "x$prefix" != "x$local_prefix" \
3308    && test "$prefix" != "NONE"; then
3309   AC_DEFINE_UNQUOTED(PREFIX_INCLUDE_DIR, "$prefix/include",
3310 [Define to PREFIX/include if cpp should also search that directory.])
3311 fi
3312
3313 # Test for stack protector support in target C library.
3314 AC_CACHE_CHECK(__stack_chk_fail in target C library,
3315       gcc_cv_libc_provides_ssp,
3316       [gcc_cv_libc_provides_ssp=no
3317     case "$target" in
3318        *-*-linux*)
3319       if test x$host != x$target || test "x$TARGET_SYSTEM_ROOT" != x; then
3320         if test "x$with_sysroot" = x; then
3321           glibc_header_dir="${exec_prefix}/${target_noncanonical}/sys-include"
3322         elif test "x$with_sysroot" = xyes; then
3323           glibc_header_dir="${exec_prefix}/${target_noncanonical}/sys-root/usr/include"
3324         else
3325           glibc_header_dir="${with_sysroot}/usr/include"
3326         fi
3327       else
3328         glibc_header_dir=/usr/include
3329       fi
3330       # glibc 2.4 and later provides __stack_chk_fail and
3331       # either __stack_chk_guard, or TLS access to stack guard canary.
3332       if test -f $glibc_header_dir/features.h \
3333          && $EGREP '^@<:@       @:>@*#[         ]*define[       ]+__GNU_LIBRARY__[      ]+([1-9][0-9]|[6-9])' \
3334             $glibc_header_dir/features.h > /dev/null; then
3335         if $EGREP '^@<:@        @:>@*#[         ]*define[       ]+__GLIBC__[    ]+([1-9][0-9]|[3-9])' \
3336            $glibc_header_dir/features.h > /dev/null; then
3337           gcc_cv_libc_provides_ssp=yes
3338         elif $EGREP '^@<:@      @:>@*#[         ]*define[       ]+__GLIBC__[    ]+2' \
3339              $glibc_header_dir/features.h > /dev/null \
3340              && $EGREP '^@<:@   @:>@*#[         ]*define[       ]+__GLIBC_MINOR__[      ]+([1-9][0-9]|[4-9])' \
3341              $glibc_header_dir/features.h > /dev/null; then
3342           gcc_cv_libc_provides_ssp=yes
3343         fi
3344         fi
3345         ;;
3346        *-*-darwin*)
3347          AC_CHECK_FUNC(__stack_chk_fail,[gcc_cv_libc_provides_ssp=yes],
3348            [echo "no __stack_chk_fail on this target"])
3349         ;;
3350   *) gcc_cv_libc_provides_ssp=no ;;
3351     esac])
3352
3353 if test x$gcc_cv_libc_provides_ssp = xyes; then
3354   AC_DEFINE(TARGET_LIBC_PROVIDES_SSP, 1,
3355             [Define if your target C library provides stack protector support])
3356 fi
3357
3358 # Check if TFmode long double should be used by default or not.
3359 # Some glibc targets used DFmode long double, but with glibc 2.4
3360 # and later they can use TFmode.
3361 case "$target" in
3362   powerpc*-*-*gnu* | \
3363   sparc*-*-linux* | \
3364   s390*-*-linux* | \
3365   alpha*-*-linux*)
3366     AC_ARG_WITH(long-double-128,
3367 [  --with-long-double-128  Use 128-bit long double by default.],
3368       gcc_cv_target_ldbl128="$with_long_double_128",
3369       [gcc_cv_target_ldbl128=no
3370       if test x$host != x$target || test "x$TARGET_SYSTEM_ROOT" != x; then
3371         if test "x$with_sysroot" = x; then
3372           glibc_header_dir="${exec_prefix}/${target_noncanonical}/sys-include"
3373         elif test "x$with_sysroot" = xyes; then
3374           glibc_header_dir="${exec_prefix}/${target_noncanonical}/sys-root/usr/include"
3375         else
3376           glibc_header_dir="${with_sysroot}/usr/include"
3377         fi
3378       else
3379         glibc_header_dir=/usr/include
3380       fi
3381 changequote(,)dnl
3382       grep '^[  ]*#[    ]*define[       ][      ]*__LONG_DOUBLE_MATH_OPTIONAL' \
3383         $glibc_header_dir/bits/wordsize.h > /dev/null 2>&1 \
3384       && gcc_cv_target_ldbl128=yes
3385 changequote([,])dnl
3386       ])
3387     ;;
3388 esac
3389 if test x$gcc_cv_target_ldbl128 = xyes; then
3390   AC_DEFINE(TARGET_DEFAULT_LONG_DOUBLE_128, 1,
3391             [Define if TFmode long double should be the default])
3392 fi
3393
3394 # Find out what GC implementation we want, or may, use.
3395 AC_ARG_WITH(gc,
3396 [  --with-gc={page,zone}   choose the garbage collection mechanism to use
3397                           with the compiler],
3398 [case "$withval" in
3399   page)
3400     GGC=ggc-$withval
3401     ;;
3402   zone)
3403     GGC=ggc-$withval
3404     AC_DEFINE(GGC_ZONE, 1, [Define if the zone collector is in use])
3405     ;;
3406   *)
3407     AC_MSG_ERROR([$withval is an invalid option to --with-gc])
3408     ;;
3409 esac],
3410 [GGC=ggc-page])
3411 AC_SUBST(GGC)
3412 echo "Using $GGC for garbage collection."
3413
3414 # Use the system's zlib library.
3415 zlibdir=-L../zlib
3416 zlibinc="-I\$(srcdir)/../zlib"
3417 AC_ARG_WITH(system-zlib,
3418 [  --with-system-zlib      use installed libz],
3419 zlibdir=
3420 zlibinc=
3421 )
3422 AC_SUBST(zlibdir)
3423 AC_SUBST(zlibinc)
3424
3425 dnl Very limited version of automake's enable-maintainer-mode
3426
3427 AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])
3428   dnl maintainer-mode is disabled by default
3429   AC_ARG_ENABLE(maintainer-mode,
3430 [  --enable-maintainer-mode
3431                           enable make rules and dependencies not useful
3432                           (and sometimes confusing) to the casual installer],
3433       maintainer_mode=$enableval,
3434       maintainer_mode=no)
3435
3436 AC_MSG_RESULT($maintainer_mode)
3437
3438 if test "$maintainer_mode" = "yes"; then
3439   MAINT=''
3440 else
3441   MAINT='#'
3442 fi
3443 AC_SUBST(MAINT)dnl
3444
3445 # --------------
3446 # Language hooks
3447 # --------------
3448
3449 # Make empty files to contain the specs and options for each language.
3450 # Then add #include lines to for a compiler that has specs and/or options.
3451
3452 subdirs=
3453 lang_opt_files=
3454 lang_specs_files=
3455 lang_tree_files=
3456 # These (without "all_") are set in each config-lang.in.
3457 # `language' must be a single word so is spelled singularly.
3458 all_languages=
3459 all_compilers=
3460 all_outputs='Makefile gccbug libada-mk'
3461 # List of language makefile fragments.
3462 all_lang_makefrags=
3463 # List of language subdirectory makefiles.  Deprecated.
3464 all_lang_makefiles=
3465 # Files for gengtype
3466 all_gtfiles="$target_gtfiles"
3467 # Files for gengtype with language
3468 all_gtfiles_files_langs=
3469 all_gtfiles_files_files=
3470
3471 # These are the languages that are set in --enable-languages,
3472 # and are available in the GCC tree.
3473 all_selected_languages=
3474
3475 # Add the language fragments.
3476 # Languages are added via two mechanisms.  Some information must be
3477 # recorded in makefile variables, these are defined in config-lang.in.
3478 # We accumulate them and plug them into the main Makefile.
3479 # The other mechanism is a set of hooks for each of the main targets
3480 # like `clean', `install', etc.
3481
3482 language_hooks="Make-hooks"
3483
3484 for lang in ${srcdir}/*/config-lang.in
3485 do
3486 changequote(,)dnl
3487         test "$lang" = "${srcdir}/*/config-lang.in" && continue
3488
3489         lang_alias=`sed -n -e 's,^language=['"'"'"'"]\(.*\)["'"'"'"'].*$,\1,p' -e 's,^language=\([^   ]*\).*$,\1,p' $lang`
3490         if test "x$lang_alias" = x
3491         then
3492               echo "$lang doesn't set \$language." 1>&2
3493               exit 1
3494         fi
3495         subdir="`echo $lang | sed -e 's,^.*/\([^/]*\)/config-lang.in$,\1,'`"
3496         subdirs="$subdirs $subdir"
3497         case ",$enable_languages," in
3498         *,$lang_alias,*)
3499             all_selected_languages="$all_selected_languages $lang_alias"
3500             if test -f $srcdir/$subdir/lang-specs.h; then
3501                 lang_specs_files="$lang_specs_files $srcdir/$subdir/lang-specs.h"
3502             fi
3503             ;;
3504         esac
3505 changequote([,])dnl
3506
3507         language=
3508         boot_language=
3509         compilers=
3510         outputs=
3511         gtfiles=
3512         subdir_requires=
3513         . ${srcdir}/$subdir/config-lang.in
3514         if test "x$language" = x
3515         then
3516                 echo "${srcdir}/$subdir/config-lang.in doesn't set \$language." 1>&2
3517                 exit 1
3518         fi
3519
3520         ok=:
3521         case ",$enable_languages," in
3522                 *,$lang_alias,*) ;;
3523                 *)
3524                         for i in $subdir_requires; do
3525                                 test -f "${srcdir}/$i/config-lang.in" && continue
3526                                 ok=false
3527                                 break
3528                         done
3529                 ;;
3530         esac
3531         $ok || continue
3532
3533         all_lang_makefrags="$all_lang_makefrags \$(srcdir)/$subdir/Make-lang.in"
3534         if test -f $srcdir/$subdir/lang.opt; then
3535             lang_opt_files="$lang_opt_files $srcdir/$subdir/lang.opt"
3536         fi
3537         if test -f $srcdir/$subdir/$subdir-tree.def; then
3538             lang_tree_files="$lang_tree_files $srcdir/$subdir/$subdir-tree.def"
3539         fi
3540         if test -f ${srcdir}/$subdir/Makefile.in
3541                 then all_lang_makefiles="$subdir/Makefile"
3542         fi
3543         all_languages="$all_languages $language"
3544         all_compilers="$all_compilers $compilers"
3545         all_outputs="$all_outputs $outputs"
3546         all_gtfiles="$all_gtfiles $gtfiles"
3547         for f in $gtfiles
3548         do
3549                 all_gtfiles_files_langs="$all_gtfiles_files_langs ${subdir} "
3550                 all_gtfiles_files_files="$all_gtfiles_files_files ${f} "
3551         done
3552 done
3553
3554 # Pick up gtfiles for c
3555 gtfiles=
3556 subdir="c"
3557 . ${srcdir}/c-config-lang.in
3558 all_gtfiles="$all_gtfiles $gtfiles"
3559 for f in $gtfiles
3560 do
3561         all_gtfiles_files_langs="$all_gtfiles_files_langs ${subdir} "
3562         all_gtfiles_files_files="$all_gtfiles_files_files ${f} "
3563 done
3564
3565 check_languages=
3566 for language in $all_selected_languages
3567 do
3568         check_languages="$check_languages check-$language"
3569 done
3570
3571 # We link each language in with a set of hooks, reached indirectly via
3572 # lang.${target}.  Only do so for selected languages.
3573
3574 rm -f Make-hooks
3575 touch Make-hooks
3576 target_list="all.cross start.encap rest.encap tags \
3577         install-common install-man install-info install-pdf dvi pdf \
3578         html uninstall info man srcextra srcman srcinfo \
3579         mostlyclean clean distclean maintainer-clean"
3580
3581 for t in $target_list
3582 do
3583         x=
3584         for lang in $all_selected_languages
3585         do
3586                 x="$x $lang.$t"
3587         done
3588         echo "lang.$t: $x" >> Make-hooks
3589 done
3590
3591 # --------
3592 # UNSORTED
3593 # --------
3594
3595 # Create .gdbinit.
3596
3597 echo "dir ." > .gdbinit
3598 echo "dir ${srcdir}" >> .gdbinit
3599 if test x$gdb_needs_out_file_path = xyes
3600 then
3601         echo "dir ${srcdir}/config/"`dirname ${out_file}` >> .gdbinit
3602 fi
3603 if test "x$subdirs" != x; then
3604         for s in $subdirs
3605         do
3606                 echo "dir ${srcdir}/$s" >> .gdbinit
3607         done
3608 fi
3609 echo "source ${srcdir}/gdbinit.in" >> .gdbinit
3610
3611 # If $(exec_prefix) exists and is not the same as $(prefix), then compute an
3612 # absolute path for gcc_tooldir based on inserting the number of up-directory
3613 # movements required to get from $(exec_prefix) to $(prefix) into the basic
3614 # $(libsubdir)/@(unlibsubdir) based path.
3615 # Don't set gcc_tooldir to tooldir since that's only passed in by the toplevel
3616 # make and thus we'd get different behavior depending on where we built the
3617 # sources.
3618 if test x$exec_prefix = xNONE -o x$exec_prefix = x$prefix; then
3619     gcc_tooldir='$(libsubdir)/$(unlibsubdir)/../$(target_noncanonical)'
3620 else
3621 changequote(<<, >>)dnl
3622 # An explanation of the sed strings:
3623 #  -e 's|^\$(prefix)||'   matches and eliminates 'prefix' from 'exec_prefix'
3624 #  -e 's|/$||'            match a trailing forward slash and eliminates it
3625 #  -e 's|^[^/]|/|'        forces the string to start with a forward slash (*)
3626 #  -e 's|/[^/]*|../|g'    replaces each occurrence of /<directory> with ../
3627 #
3628 # (*) Note this pattern overwrites the first character of the string
3629 # with a forward slash if one is not already present.  This is not a
3630 # problem because the exact names of the sub-directories concerned is
3631 # unimportant, just the number of them matters.
3632 #
3633 # The practical upshot of these patterns is like this:
3634 #
3635 #  prefix     exec_prefix        result
3636 #  ------     -----------        ------
3637 #   /foo        /foo/bar          ../
3638 #   /foo/       /foo/bar          ../
3639 #   /foo        /foo/bar/         ../
3640 #   /foo/       /foo/bar/         ../
3641 #   /foo        /foo/bar/ugg      ../../
3642 #
3643     dollar='$$'
3644     gcc_tooldir="\$(libsubdir)/\$(unlibsubdir)/\`echo \$(exec_prefix) | sed -e 's|^\$(prefix)||' -e 's|/\$(dollar)||' -e 's|^[^/]|/|' -e 's|/[^/]*|../|g'\`\$(target_noncanonical)"
3645 changequote([, ])dnl
3646 fi
3647 AC_SUBST(gcc_tooldir)
3648 AC_SUBST(dollar)
3649
3650 # Find a directory in which to install a shared libgcc.
3651
3652 AC_ARG_ENABLE(version-specific-runtime-libs,
3653 [  --enable-version-specific-runtime-libs
3654                           specify that runtime libraries should be
3655                           installed in a compiler-specific directory])
3656
3657 AC_ARG_WITH(slibdir,
3658 [  --with-slibdir=DIR      shared libraries in DIR [[LIBDIR]]],
3659 slibdir="$with_slibdir",
3660 if test "${enable_version_specific_runtime_libs+set}" = set; then
3661   slibdir='$(libsubdir)'
3662 elif test "$host" != "$target"; then
3663   slibdir='$(build_tooldir)/lib'
3664 else
3665   slibdir='$(libdir)'
3666 fi)
3667 AC_SUBST(slibdir)
3668
3669 objdir=`${PWDCMD-pwd}`
3670 AC_SUBST(objdir)
3671
3672 AC_ARG_WITH(datarootdir,
3673 [  --with-datarootdir=DIR  Use DIR as the data root [[PREFIX/share]]],
3674 datarootdir="\${prefix}/$with_datarootdir",
3675 datarootdir='$(prefix)/share')
3676 AC_SUBST(datarootdir)
3677
3678 AC_ARG_WITH(docdir,
3679 [  --with-docdir=DIR       Install documentation in DIR [[DATAROOTDIR]]],
3680 docdir="\${prefix}/$with_docdir",
3681 docdir='$(datarootdir)')
3682 AC_SUBST(docdir)
3683
3684 AC_ARG_WITH(htmldir,
3685 [  --with-htmldir=DIR      html documentation in in DIR [[DOCDIR]]],
3686 htmldir="\${prefix}/$with_htmldir",
3687 htmldir='$(docdir)')
3688 AC_SUBST(htmldir)
3689
3690 # Substitute configuration variables
3691 AC_SUBST(subdirs)
3692 AC_SUBST(srcdir)
3693 AC_SUBST(all_compilers)
3694 AC_SUBST(all_gtfiles)
3695 AC_SUBST(all_gtfiles_files_langs)
3696 AC_SUBST(all_gtfiles_files_files)
3697 AC_SUBST(all_lang_makefrags)
3698 AC_SUBST(all_lang_makefiles)
3699 AC_SUBST(all_languages)
3700 AC_SUBST(all_selected_languages)
3701 AC_SUBST(build_exeext)
3702 AC_SUBST(build_install_headers_dir)
3703 AC_SUBST(build_xm_file_list)
3704 AC_SUBST(build_xm_include_list)
3705 AC_SUBST(build_xm_defines)
3706 AC_SUBST(check_languages)
3707 AC_SUBST(cpp_install_dir)
3708 AC_SUBST(xmake_file)
3709 AC_SUBST(tmake_file)
3710 AC_SUBST(extra_gcc_objs)
3711 AC_SUBST(extra_headers_list)
3712 AC_SUBST(extra_objs)
3713 AC_SUBST(extra_parts)
3714 AC_SUBST(extra_passes)
3715 AC_SUBST(extra_programs)
3716 AC_SUBST(float_h_file)
3717 AC_SUBST(gcc_config_arguments)
3718 AC_SUBST(gcc_gxx_include_dir)
3719 AC_SUBST(host_exeext)
3720 AC_SUBST(host_xm_file_list)
3721 AC_SUBST(host_xm_include_list)
3722 AC_SUBST(host_xm_defines)
3723 AC_SUBST(out_host_hook_obj)
3724 AC_SUBST(install)
3725 AC_SUBST(lang_opt_files)
3726 AC_SUBST(lang_specs_files)
3727 AC_SUBST(lang_tree_files)
3728 AC_SUBST(local_prefix)
3729 AC_SUBST(md_file)
3730 AC_SUBST(objc_boehm_gc)
3731 AC_SUBST(out_file)
3732 AC_SUBST(out_object_file)
3733 AC_SUBST(thread_file)
3734 AC_SUBST(tm_file_list)
3735 AC_SUBST(tm_include_list)
3736 AC_SUBST(tm_defines)
3737 AC_SUBST(tm_p_file_list)
3738 AC_SUBST(tm_p_include_list)
3739 AC_SUBST(xm_file_list)
3740 AC_SUBST(xm_include_list)
3741 AC_SUBST(xm_defines)
3742 AC_SUBST(c_target_objs)
3743 AC_SUBST(cxx_target_objs)
3744 AC_SUBST(target_cpu_default)
3745
3746 AC_SUBST_FILE(language_hooks)
3747
3748 # Echo link setup.
3749 if test x${build} = x${host} ; then
3750   if test x${host} = x${target} ; then
3751     echo "Links are now set up to build a native compiler for ${target}." 1>&2
3752   else
3753     echo "Links are now set up to build a cross-compiler" 1>&2
3754     echo " from ${host} to ${target}." 1>&2
3755   fi
3756 else
3757   if test x${host} = x${target} ; then
3758     echo "Links are now set up to build (on ${build}) a native compiler" 1>&2
3759     echo " for ${target}." 1>&2
3760   else
3761     echo "Links are now set up to build (on ${build}) a cross-compiler" 1>&2
3762     echo " from ${host} to ${target}." 1>&2
3763   fi
3764 fi
3765
3766 AC_ARG_VAR(GMPLIBS,[How to link GMP])
3767 AC_ARG_VAR(GMPINC,[How to find GMP include files])
3768
3769 # Configure the subdirectories
3770 # AC_CONFIG_SUBDIRS($subdirs)
3771
3772 # Create the Makefile
3773 # and configure language subdirectories
3774 AC_CONFIG_FILES($all_outputs)
3775
3776 AC_CONFIG_COMMANDS([default],
3777 [
3778 case ${CONFIG_HEADERS} in
3779   *auto-host.h:config.in*)
3780   echo > cstamp-h ;;
3781 esac
3782 # Make sure all the subdirs exist.
3783 for d in $subdirs doc build
3784 do
3785     test -d $d || mkdir $d
3786 done
3787 ],
3788 [subdirs='$subdirs'])
3789 AC_OUTPUT